The Delphi Magazine: Complete Article Detail

The Delphi Magazine: Complete Article Detail

Under Construction: Build Your Own Components
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	1 : April 1995	View article	View source code
Summary	Bob Swart kicks off his regular column by showing us how to get started on writing Delphi components, using Date and Agenda components as his examples.
Keywords	Agenda component; Building components; Date components; Date formats; Hex and Roman formats; Under Construction Column

Moving Up: Borland Pascal
Authors	Dave Jewell		Type: Article
Issue	1 : April 1995	View article	No source code
Summary	Dave Jewell gives the Borland Pascal developers amongst us the low down on moving up to Delphi
Keywords	As, Is and In keywords; Borland Pascal; Case optimisations; Class versus Object; Exception handling; Open arrays; Properties; Result variable in functions

The Delphi Idiom
Authors	Steve Teixeira		Type: Article
Issue	1 : April 1995	View article	No source code
Summary	Steve provides an insider's introduction to Delphi's features and capabilities.
Keywords	Exception handling; Message handling

Optimising Display Updating
Authors	Mike Scott		Type: Article
Issue	1 : April 1995	View article	View source code
Summary	Mike shows how to make your screen refreshes really fast.
Keywords	Clipping regions; Graphics; Paint method; Reducing flicker; Screen refresh

Inroducing Client/Server
Authors	Sundar Rajan		Type: Article
Issue	1 : April 1995	View article	No source code
Summary	A beginner's guide to client/server development, explaining some key principles and the benefits to be gained from using Delphi.
Keywords	2-schema and 3-schema; Client/server

Delphi Internals: Using and Writing DLLs
Authors	Dave Jewell		Type: Article
Issue	1 : April 1995	View article	No source code
Summary	Dave shows how to call DLLs in Delphi applications and how to write your own.
Keywords	Delphi Internals column; EXTERNAL keyword; Using DLLs; WINPROCS unit; Writing DLLs

Book Review: "Inside Windows 95" by Adrian King
Authors	Bob Swart (aka Dr.Bob)		Type: Review
Issue	1 : April 1995	View article	No source code
Summary
Keywords	Adrian King; Book reviews; Inside Windows 95; Windows 95

Using the Borland Visual Solutions Pack
Authors	Jeroen Pluimers		Type: Review
Issue	1 : April 1995	View article	View source code
Summary	A review of and tips on using the Visual Solutions Pack of VBX controls with Delphi, including an example RTF editor.
Keywords	Installing VBX controls; RTF editor; Reviews; Visual Solutions Pack

Animation Made Easy
Authors	Xavier Pacheco		Type: Article
Issue	1 : April 1995	View article	View source code
Summary	How to achieve simple sprite animation using Delphi.
Keywords	Animation; BitBlt; Graphics; Screen flicker; Sprites; Using bitmaps

Review: The Chief's Installer Pro
Authors	Bob Swart (aka Dr.Bob)		Type: Review
Issue	1 : April 1995	View article	No source code
Summary	Bob Swart looks into this shareware Windows installation program which is ideal for installing your Delphi applications -- even better, it is included on the free disk with Issue 2.
Keywords	Chief's Installer Pro; Dr A Olowofoyeku; Install programs; Reviews; The African Chief

Failure to initialise IDAPI error
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	1 : April 1995	View article	View source code
Summary	The BDE requires SHARE.EXE to be loaded or this error results.
Keywords	BDE Error code $2C09; Failure to initialise IDAPI; SHARE.EXE

Component in Design or Runtime mode?
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	1 : April 1995	View article	View source code
Summary	Use csDesigning flag.
Keywords	Component building; Design or runtime mode; csDesigning

TEXT file type
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	1 : April 1995	View article	View source code
Summary	Use SYSTEM.TEXT to specify this file type.
Keywords	Error 21: Error in type; SYSTEM unit; TEXT file type

Private, Public, Published identifiers
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	1 : April 1995	View article	View source code
Summary	Private, Public, Published identifiers explained.
Keywords	Component building; Private; Public; Published

Working with MS Access files in Delphi 1
Authors	Chris Frizelle , Ralph Friedman		Type: Clinic
Issue	1 : April 1995	View article	View source code
Summary	How to use MS Access .MDB files in Delphi 1
Keywords	.MDB files; Access ODBC driver; MS Access files; ODBC

Assigning initial property values
Authors	Bob Swart (aka Dr.Bob)		Type: Tip
Issue	1 : April 1995	View article	View source code
Summary	How to assign initial values to properties in your components.
Keywords	Component building; Initialising properties; Properties; Property Default value; Property initial values

Auto-deleting event handler code
Authors	Bob Swart (aka Dr.Bob)		Type: Tip
Issue	1 : April 1995	View article	View source code
Summary
Keywords	Event handlers

ExitWindows
Authors	Bob Swart (aka Dr.Bob)		Type: Tip
Issue	1 : April 1995	View article	View source code
Summary	Correct definition for the ExitWindows API function
Keywords	ExitWindows API function; Windows API

Building Quality Help Systems
Authors	Robert Palomo		Type: Article
Issue	2 : July 1995	View article	No source code
Summary	Robert shows how to keep your users happy by designing and writing better Help systems for your applications.
Keywords	Building Help; Designing Help; Help authoring tools; Hypergraphics; Hypertext

Book Review: Delphi Programming For Dummies by Neil Rubenking
Authors	Bob Swart (aka Dr.Bob)		Type: Review
Issue	2 : July 1995	View article	No source code
Summary
Keywords	Book reviews; Delphi for Dummies; Neil Rubenking

Subclassing Windows
Authors	Brian Long		Type: Article
Issue	2 : July 1995	View article	View source code
Summary	Brian Long shows how to customise your windows and controls using various subclassing techniques
Keywords	Building components; Deriving objects; FreeObjectInstance; FreeProcInstance; MakeObjectInstance; MakeProcInstance; Message handlers; OnMessage; PostMessage; ProcessMessages; SendMessage; SetWindowLong; Subclassing; TMessage; Windows API; Windows messages

Under Construction:Tic-Tac-Toe
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	2 : July 1995	View article	View source code
Summary	Bob Swart's component-building column focusses on encapsulating DLLs into Delphi components, by means of a tic-tac-toe game example (better known to British readers as noughts-and-crosses!)
Keywords	Building components; Component expert; Component properties; DLL Import units; DLLs; Encapsulating DLLs; Exceptions; Explicit DLL import; Implicit DLL import; LoadLibrary; Tic-Tac-Toe; Under Construction column

Moving Up: Visual Basic
Authors	Dave Jewell		Type: Article
Issue	2 : July 1995	View article	No source code
Summary	Dave Jewell with helpful advice for those moving to Delphi from VB
Keywords	Variant records; Visual Basic

Drag & Drop is Easy...
Authors	Stuart Lunn		Type: Article
Issue	2 : July 1995	View article	View source code
Summary	Stuart Lunn shows how to make your applications accept files dragged and dropped from Windows File Manager, with other handy tips along the way
Keywords	DeleteMenu; Drag and Drop; DragAcceptFiles; DragQueryFile; DragQueryPoint; GetSystemMenu; HWND_TOPMOST; Icon on top; InsertMenu; ModifyMenu; SC_ICON; SetCharacteristics; SetWindowPos; ShellAPI; Start Iconized; Start as icon; System menu; WM_DROPFILES; WM_QUERYOPEN; WM_SYSCOMMAND; WindowState; Windows API; Windows messages

Delphi Internals: Undocumented Secrets, Part 1
Authors	Dave Jewell		Type: Article
Issue	2 : July 1995	View article	No source code
Summary	Dave Jewell delves under the bonnet of Delphi to look at form resources and how to implement unions
Keywords	Absolute; Delphi Internals column; Delphi forms; Form resources; Resource Workshop; Resource files; Sel variable; Undocumented; Unions

Trim String functions
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	2 : July 1995	View article	View source code
Summary	How to trim strings
Keywords	Strings; Trim function for strings

Calling secondary forms
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	2 : July 1995	View article	View source code
Summary	How to call secondary forms
Keywords	Calling forms; Forms; Hide for forms; Secondary forms; Show for forms

Menu item separators
Authors	Arjan Jansen		Type: Clinic
Issue	2 : July 1995	View article	View source code
Summary	How to add menu item separators in the Menu Designer
Keywords	Menu Designer; Menu separators; Menus

Resizing columns of a TStringGrid
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	2 : July 1995	View article	View source code
Summary	How to resize columns in a TStringGrid
Keywords	FixedCols; Resizing grid columns; TStringGrid

Closing a form on starting an application
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	2 : July 1995	View article	View source code
Summary	Closing a form on starting an application
Keywords	Closing forms; Forms

Removing scroll bars from TDBGrid
Authors	Brian Long		Type: Clinic
Issue	2 : July 1995	View article	View source code
Summary	Removing scroll bars from TDBGrid
Keywords	Removing scroll bars; Scroll bars; ScrollBars property; TDBGrid scroll bars

Shelling out to another application
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	2 : July 1995	View article	View source code
Summary	How to shell out and call another application from a Delphi application.
Keywords	Calling applications; HandleMessage; PeekMessage; Shelling out; WinExec; Windows API

Editor Shortcuts
Authors	Brian Long		Type: Tip
Issue	2 : July 1995	View article	View source code
Summary	Shortcut keys for the Delphi code editor
Keywords	Delphi IDE; Editor shortcuts; Keyboard shortcuts

Customising the toolbar
Authors	Nick Hodges		Type: Tip
Issue	2 : July 1995	View article	View source code
Summary	How to customise the Delphi IDE toolbar
Keywords	Custimising the Toolbar; Delphi IDE

Smaller executable files
Authors	Nick Hodges		Type: Tip
Issue	2 : July 1995	View article	View source code
Summary	How to make your executable files smaller from the Delphi 1 IDE and using W8LOSS.EXE
Keywords	Smaller EXE files; W8LOSS.EXE

File utility routines
Authors	Nick Hodges		Type: Tip
Issue	2 : July 1995	View article	View source code
Summary	Where to find handy routines to copy, move and execute files
Keywords	File copy; File execute; File move; File utility routines

Passing variable numbers of parameters
Authors	Hallvard Vassbotn		Type: Tip
Issue	2 : July 1995	View article	View source code
Summary	How to write procedures and functions which can take a variable number of parameters using the TVarRec type
Keywords	Parameter passing; Procedures and functions; TVarRec; Variable number parameters

Exporting classes from DLLs
Authors	Hallvard Vassbotn		Type: Tip
Issue	2 : July 1995	View article	View source code
Summary	How to write DLLs which export Delphi classes
Keywords	DLLs; Exporting classes from DLLs; Writing DLLs; abstract; cdecl; export; virtual

WinCRT must appear last in the USES statement
Authors	Hallvard Vassbotn		Type: Tip
Issue	2 : July 1995	View article	View source code
Summary	To avoid error 85 "; expected" when using the WinCRT unit, ensure WinCRT appears last in your USES statement
Keywords	USES; WinCRT; error 85

TDBGrid bug: FixedColor is ignored
Authors	Hallvard Vassbotn		Type: Tip
Issue	2 : July 1995	View article	View source code
Summary	In Delphi 1 the FixedColor property does not work, this provides a fix
Keywords	Delphi 1 bugs; FixedColor in TDBGrid; TDBGrid

A Windows Desktop Canvas and Non-Client area Canvas
Authors	Stefan Boether		Type: Tip
Issue	2 : July 1995	View article	View source code
Summary	Implementation of a Canvas object for the Windows desktop area, which can be useful for screen savers, splash screens etc; plus a Canvas for a window's non-client area (for customising window frames).
Keywords	Canvas; TCanvas; Window NC area; Window non-client area; Windows Desktop canvas

Using RES bitmaps
Authors	Stefan Boether		Type: Tip
Issue	2 : July 1995	View article	View source code
Summary	How to load RES file bitmaps in Delphi
Keywords	Bitmaps; Graphics; RES format bitmaps; TBitmap

Smart IDE
Authors	Stefan Boether		Type: Tip
Issue	2 : July 1995	View article	View source code
Summary	Customising the Delphi IDE for faster operation on a laptop
Keywords	COMPLIB.DCL; Delphi IDE; Laptop; Saving memory

Clipboard Object
Authors	Stefan Boether		Type: Tip
Issue	2 : July 1995	View article	View source code
Summary	A clipboard object, TMemoClipboard, which supports Delphi's TStrings object type for passing long text over the Windows clipboard.
Keywords	Clipboard; TClipBoard; TStrings

Book Reviews
Authors	Bob Swart (aka Dr.Bob) , Steve Troxell		Type: Review
Issue	3 : September 1995	View article	No source code
Summary	Bob Swart and Steve Troxell review 'Delphi Programming Explorer' and 'Delphi Developer's Guide'
Keywords	Book reviews; Delphi Developers Guide; Delphi Programming Explorer; Steve Teixeira; Xavier Pacheco

Preview: 32-Bit Delphi
Authors	Chris Frizelle		Type: Article
Issue	3 : September 1995	View article	No source code
Summary	What you've all been waiting for! Chris Frizelle has details on what to expect in Borland's new version of Delphi for Windows95 and NT
Keywords	32 bit BDE; Delphi 2 preview

Surviving Client/Server: Getting Started With SQL, Part 1
Authors	Steve Troxell		Type: Article
Issue	3 : September 1995	View article	No source code
Summary	Steve Troxell kicks off a brand new column for Client/Server developers with the first of a 2-part series on the basics of the SQL language
Keywords	ISQL; InterBase; Interactive SQL; Joining tables; SQL; SQL Join; SQL operators; SQL transactions; SQL: Adding records; SQL: BETWEEN; SQL: COMMIT; SQL: DELETE; SQL: INSERT; SQL: LIKE; SQL: ORDER BY; SQL: ROLLBACK; SQL: SELECT; SQL: SET; SQL: Sorting; SQL: UPDATE; SQL: VALUES; SQL: WHERE; SQL: Wildcards; SQL: copying records; Surviving Client/Server

Custom Clipboard Formats
Authors	Xavier Pacheco		Type: Article
Issue	3 : September 1995	View article	View source code
Summary	Xavier Pachero explains how to put anything you like onto the Windows clipboard
Keywords	Clipboard; Custom clipboard formats; RegisterClipboardFormat; Streams; TClipboard; TMemoryStream; Windows API

Under Construcion: Customising Controls
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	3 : September 1995	View article	View source code
Summary	Bob Swart shows how to derive new components from existing ones, using a right-aligned edit control as an example
Keywords	Adding properties; Alignment of text; Building components; Component palette bitmaps; Deriving components; Hiding properties; Prevent control resizing; Private; Published; Resource Workshop; Right aligned TEdit; SetBounds; TCustom... components; Under Construction column

Moving Up: C and C++
Authors	Dave Jewell		Type: Article
Issue	3 : September 1995	View article	No source code
Summary	Dave Jewell has some good advice for C/C++ developers trading up to Delphi
Keywords	32 bits; Allocating memory; C and C++; Conditional compilation; Converting C to Pascal; Count for ListBox; Create; CtoP C translator; DLL header conversion; Delphi for C programmers; Delphi for C++ programmers; Destroy; HeadConv expert; Huge pointers; ItemIndex; LB_SETCURSEL; Message handling; Porting 16 to 32 bits; Porting C to Pascal; Smart linking; WINDOWSX.H; WM_INITDIALOG; WinMain; Windows API; Windows messages; _hread; _hwrite; far declaration; implementation; interface; message cracker; pre-processor macros; static; unit

Typecasting Explained: Part 1
Authors	Brian Long		Type: Article
Issue	3 : September 1995	View article	View source code
Summary	Brian Long sheds much-needed light on the subject of typecasting, which even causes experienced developers to trip up!
Keywords	HiWord; LoWord; Offset; Ofs; Pointers; Random numbers; Randomize; Seg; Segment; Segmented memory; SysUtils unit; Tag; Typecasting; Variable typecasts; initialization

Writing Your Own Experts
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	3 : September 1995	View article	View source code
Summary	Bob Swart shows that creating Delphi experts isn't that hard, as he takes us through the steps of building a DLL Skeleton Generator Expert
Keywords	AddExitProc; Building DLLs; C DLL Header converter; COMPLIB.DCL; CloseProject; Compiling DLLs; DLL skeleton expert; DLLs; Delphi IDE; ExitProc; Experts; Exporting from DLLs; ExptIntf unit; GetComment; GetIDString; GetStyle; HeadConv; Installing experts; OpenProject; Project Experts; TIExpert; TOOLINTF unit; ToolServices; Using DLLS written in C; Writing experts; esEnabled; esForm; esProject; esStandard

Delphi Internals: Through The Language Barrier
Authors	Dave Jewell		Type: Article
Issue	3 : September 1995	View article	View source code
Summary	Dave Jewell continues his explanation of creating DLLs with Delphi, showing how to put Delphi forms into DLLs which can then be called from other languages
Keywords	Borland Pascal; C/C++; Calling Delphi DLLs from C; Calling Delphi DLLs from VB; Creating DLLs; DLLs; Delphi Internals column; FormCreate; Hiding forms; Library keyword; ModalResult; Null terminated strings; PChar; Putting forms into DLLs; ShowModal; StrNew; StrPas; TCalendar; Using DLLS; Visual Basic; exports keyword; implementation

Painting to a device context
Authors	Danny Thorpe		Type: Clinic
Issue	3 : September 1995	View article	View source code
Summary	Tricks used by Delphi when painting to a Device Context
Keywords	DC; Device context; Painting; Windows API

Menu shortcuts
Authors	Michael Williams		Type: Clinic
Issue	3 : September 1995	View article	View source code
Summary	In Delphi 1 implementing menu shortcut keys sometimes didn't work. A fix is provided
Keywords	Delphi 1 bugs; Menu shortcut keys; Menus; Menus unit; ShortCutToKey

Navigating through forms
Authors	Nick Hodges		Type: Clinic
Issue	3 : September 1995	View article	View source code
Summary	How to navigate through forms in the Delphi IDE using F12 or the Form list
Keywords	Delphi IDE

Uses clause in a DLL source file
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	3 : September 1995	View article	View source code
Summary	A uses clause in a DLL source code file is not strictly necessary but not having one will cause a compilation error, which can be ignored
Keywords	Building DLLs; DLLs; USES; Uses clause in DLL

Turbo Debugger incorrect linker version
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	3 : September 1995	View article	View source code
Summary	Turbo Debugger 3.2 won't work with Delphi 1 -- use Turbo Debugger 4.6 from the RAD Pack or Borland C++ 4.51 or greater
Keywords	Debugging; Incorrect linker version; Turbo Debugger

How to make a window stay on top
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	3 : September 1995	View article	View source code
Summary	Using a form's fsStayOnTop property to make it stay on top of other windows
Keywords	FormStyle; Making windows stay on top; Stay on top; Topmost window; fsStayOnTop

Manipulating pixels in bitmaps
Authors	Brian Long		Type: Clinic
Issue	3 : September 1995	View article	View source code
Summary	Using a bitmap's Canvas to manipulate individual pixels
Keywords	Canvas; Pixels property; TImage

Popup menus
Authors	Brian Long		Type: Tip
Issue	3 : September 1995	View article	View source code
Summary	How do you find which component on a form caused a popup menu to appear? The PopupComponent property doesn't work properly..
Keywords	KeyPreview; Popup menus; PopupComponent property

Form designer: shortcut keys
Authors	Tony McKiernan		Type: Tip
Issue	3 : September 1995	View article	View source code
Summary	Moving controls on forms using Ctrl+cursor and Shift+cursor
Keywords	Delphi IDE

More editor shortcut keys
Authors	Arjan Jansen		Type: Tip
Issue	3 : September 1995	View article	View source code
Summary	More shortcut keys for the Delphi IDE editor
Keywords	Delphi IDE; Editor shortcut keys

Replacing if..then..else
Authors	Brian Long		Type: Tip
Issue	3 : September 1995	View article	View source code
Summary	How to replace clumsy if..then..else statements with clever typed constant constructs
Keywords	if..then..else; typed constants

Are we in range?
Authors	Brian Long		Type: Tip
Issue	3 : September 1995	View article	View source code
Summary	Using sets to check if a numeric value is within a required range
Keywords	checking range; in keyword; sets

Book Review: Delphi Unleashed
Authors	Jeroen Pluimers		Type: Review
Issue	4 : November 1995	View article	No source code
Summary	Jeroen Pluimers reviews Charlie Calvert's comprehensive Delphi guide
Keywords	Book reviews; Charlie Calvert; Delphi Unleashed

Inside TApplication
Authors	Nick Hodges , Hallvard Vassbotn		Type: Article
Issue	4 : November 1995	View article	View source code
Summary	Did You know all your Delphi programs have an extra zero sized window? Nick Hodges shows how to take advantage of TApplication's features, with extra tips from Hallvard Vassbotn too
Keywords	Application; Application title; Cascade windows; CmdShow; ColorDialog; Command line; Component list; ComponentCount; CreateWindow; Drag and drop; DragAcceptFiles; EXEName; ExtractFileName; ExtractFilePath; FormCreate; FormStyle; HintColor property; Hints; HookMainWindow; Icon captions; Icon on top; Icon property; Message handling; NormalizeTopMosts; OnMessage event; OnMinimize event; ProcessMessages; RestoreTopMosts; SetWindowPos; ShowWindow; Stay on top; System unit; TApplication; Terminated; Tile windows; UnHookMainWindow; WM_WindowPosChanging; WinProcs unit; WindowState; Windows API; Windows messages; fsStayOnTop; wm_DropFiles; wm_Paint

Surviving Client/Server: Getting Started With SQL, Part 2
Authors	Steve Troxell		Type: Article
Issue	4 : November 1995	View article	No source code
Summary	Steve Troxell continues his column with the second part of his explanation of the basics of SQL
Keywords	SQL; SQL: AVG; SQL: COUNT; SQL: DISTINCT; SQL: GROUP BY; SQL: HAVING; SQL: MAX; SQL: MIN; SQL: ORDER BY; SQL: SUM; SQL: UNION; SQL: aggregate functions; SQL: duplicate rows; SQL: grouping data; SQL: limiting groups; SQL: select unique records; SQL: sorting; SQL: unions; Surviving Client/Server

Under Construction: Component Help
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	4 : November 1995	View article	View source code
Summary	Bob Swart shows how to integrate help for developers using your compoents into Delphi's multihelp environment
Keywords	Building components; Creating Windows Help; Creating component Help; DLL wrappers; DLLs; Encapsulating DLLS; Encoding binary files; Help files; Help keywords; KWGEN utility; UUDecode; UUEncode; Under Construction column

Typecasting Explained: Part 2
Authors	Brian Long		Type: Article
Issue	4 : November 1995	View article	View source code
Summary	This time Brian Long covers message crackers, safe object typecasting and assembler typecasting
Keywords	32 bits; AS keyword; Assembler; BIOS data; BIOSCounter property; Delegation; GetBIOSCounter; IS keyword; Mem, MemW, MemL; Message crackers; Message handling; Msg message number; OnActivate; Reading directly from memory; Sender; TMessage; TMinMaxInfo; TObject; Timer; Typecasting; Typecasting objects; WM_GetMinMaxInfo; WParam and LParam; Win32; Windows API; Windows messages

Customised Logins
Authors	Xavier Pacheco		Type: Article
Issue	4 : November 1995	View article	View source code
Summary	Xavier Pacheco explains how to customise Delphi's database login features to give your applications that extra zing!
Keywords	BDE configuration; Customised database logins; Database; InterBase; LogOff and LogOn again; Login dialog; LoginDlg; LoginParams; LoginPrompt; OnLogin event; TDatabase; TDataset

Delphi Internals: Moving Up to 32-Bits
Authors	Dave Jewell		Type: Article
Issue	4 : November 1995	View article	View source code
Summary	Dave Jewell shows how to get your code ready for Delphi32, and even start making Windows 95's 32-bit calls with 16-bit Delphi!
Keywords	32 bit code in Delphi 1; 32 bits; ANSIChar; AnsiString; Asssember; Call32NT; Cardinal; Char; Delphi 1 to Delphi 2; Delphi Internals column; Generic thunk; H+ compiler directive; PolyBezier; Porting to 32 bits; SetLength; ShortString; SmallInt; Stack layout; String; Thunking; WideChar; WideString; lParam; wParam

Please Call Later...
Authors	Brian Long		Type: Article
Issue	4 : November 1995	View article	View source code
Summary	The first of a three-part series from Brian Long which aims to illuminate the mysteries of callbacks in Windows and the Borland Database Engine
Keywords	BDE; BDE callbacks; Callbacks; Callbacks in DLLs; DLLs; DPMI; EnumChildWindows; EnumWindows; Finding all the windows; Finding child windows; Fixed segments; FreeProcInstance; GPF; GetProcAddress; Interrupt handlers; InterruptRegister; Interrupts; K+ compiler directive; MMSYSTEM; MakeProcInstance; Multimedia library; NotifyRegister; Protected mode; Real mode; Real mode interrupts; ShowMessage; Smart callbacks; SysUtils unit; Thunking; Timers; ToolHelp; Trapping GPFs; Windows API; dbiRegisterCallback; stdcall; timeSetEvent

Performance Optimisation
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	4 : November 1995	View article	View source code
Summary	Bob Swart is well known as an expert in making applications go faster; this is the first of a three-part series in which he reveals his secrets...
Keywords	Accurate timers; Algorithms; BTree; Binary search; Bubble sort; Compiler options; Data structures; Delphi IDE; Efficiency; GetTickCount; Linker options; Optimising code; Performance optimisation; Quick Sort; Searching; Sorting; Speed; TDirectoryOutline; Timing code; Turbo Profiler

Left padded strings
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	4 : November 1995	View article	View source code
Summary	Left zero fill for a numeric string
Keywords	Left padded strings; Left zero fill for numbers

Error 200: published not allowed in this class
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	4 : November 1995	View article	View source code
Summary	Class requires $M+ compiler directive if it is to have published parts
Keywords	$M+ compiler directive; Building components; Error 200; RTTI; Run time type information; published

Exception handling
Authors	Nick Hodges		Type: Clinic
Issue	4 : November 1995	View article	View source code
Summary	Exception handling: use of Break on Exceptions option in Options\|Preferences\|Environment page in the IDE
Keywords	Break on except option; Delphi IDE; Exception handling; Exceptions

Removing pages from the component palette
Authors	Mike Orriss		Type: Clinic
Issue	4 : November 1995	View article	View source code
Summary	How to remove pages from the component palette
Keywords	Component palette; Delphi IDE; Removing palette pages

Initialization section for unit startup code
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	4 : November 1995	View article	View source code
Summary	Initialization section for unit startup code
Keywords	Initialization; Unit startup code

Changing Cursors
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	4 : November 1995	View article	View source code
Summary	How to change the mouse cursor
Keywords	Changing cursors; Cursors; Mouse cursor; crHourGlass

Accelerator keys
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	4 : November 1995	View article	View source code
Summary	Accelerator keys don't respond to Alt key
Keywords	Accelerator keys

Extracting icons from programs and DLLS
Authors	Nick Hodges		Type: Clinic
Issue	4 : November 1995	View article	View source code
Summary	Sample code to extract an icon from a program or DLL
Keywords	DLLS; Extracting icons; Icons

Re-reading directory using FileListBox
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	4 : November 1995	View article	View source code
Summary	Forcing FileListBox to re-read a directory
Keywords	FileListBox; Re-reading directory

Using RC files
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	4 : November 1995	View article	View source code
Summary	Linking an RC file into an executable
Keywords	$R compiler directive; Linking resource files; RC resource files

Placing objects into a StringGrid
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	4 : November 1995	View article	View source code
Summary	Placing objects into a StringGrid
Keywords	TStringGrid

Calculating difference between 2 dates
Authors	Bob Swart (aka Dr.Bob)		Type: Clinic
Issue	4 : November 1995	View article	View source code
Summary	Calculating difference between 2 dates
Keywords	Date arithmetic; Date differences; Dates

Windows Resource Li mits
Authors	Roy Nelson		Type: Tip
Issue	4 : November 1995	View article	View source code
Summary	How to overcome problems of exceeding available Windows resources, usually evidenced by the "Error creating window" message
Keywords	DestroyHandle; EOutOfResources; Error creating window; GetFormImage; MDI applications; Maximum number of windows; TTabbedNotebook; Windows API; Windows resource limits

Arrays over 64Kb in Delphi 1
Authors	Brian Long		Type: Tip
Issue	4 : November 1995	View article	View source code
Summary	How to create arrays larger than 64Kb in Delphi 1
Keywords	64Kb variable size limit; Arrays; Huge arrays

Hiding the Titlebar
Authors	Claus Ziegler		Type: Tip
Issue	4 : November 1995	View article	View source code
Summary	How to show and hide a window titlebar when an application is running
Keywords	BorderStyle; GetWindowLong; SetWindowLong; Titlebar: show and hide; Windows API

Creating Paradox auto-increment fields
Authors	Stephen Thomspon		Type: Tip
Issue	4 : November 1995	View article	View source code
Summary	Using a TQuery to create a Paradox table containing auto-increment fields
Keywords	Auto increment fields; Paradox tsble; SQL; SQL: CREATE INDEX; SQL: CREATE TABLE; TQuery

Update: Custom Clipboard Formats
Authors	Xavier Pacheco , Hallvard Vassbotn		Type: Article
Issue	4 : November 1995	View article	View source code
Summary	An update to Xavier Pacheco's article in Issue 3, courtesy of Hallvard Vassbotn with some minor corrections.
Keywords	Clipboard; Custom clipboard formats

Delphi 2.0: 32-Bit BDE Overview
Authors	Chris Frizelle		Type: Article
Issue	5 : January 1996	View article	No source code
Summary	Details of some more goodies in the 32-bit version of Delphi!
Keywords	32-bit; BDE; Database

Using Resource Files In Delphi
Authors	Dave Bolt , Ken Otto , Brian Long		Type: Article
Issue	5 : January 1996	View article	View source code
Summary	Dave Bolt uncovers the mysteries of using bitmaps, icons and cursors; Ken Otto chips in on creating custom cursors and Brian Long adds a note on using resources by number rather than name
Keywords	$R compiler directive; Animated cursor; Animation; BMP files; Bitmaps; Creating cursors; Cursors; Custom cursors; EFOpenError; Icons; Image Editor; LoadBitmap; LoadCursor; LoadIcon; RC files; RES files; Resource files; Resource numbers; Resource scripts; TImage; WM_NCMOUSEMOVE; Windows API; Windows messages

A Screen Capture Utility
Authors	Stuart Lunn		Type: Article
Issue	5 : January 1996	View article	View source code
Summary	Stuart Lunn takes us through this example project, illustrating some very handy techniques along the way
Keywords	BitBlt; Bitmaps; Cliboard: images; Clipboard; Cursors; Device context; GetDC; GetDesktopWindow; GetSystemMetrics; GetWindowDC; Inverting bitmaps; Inverting colours; Mouse handlers; Rubber banding; Screen capture; Windows API; Windows desktop

Typecasting Explained: Part 3
Authors	Brian Long		Type: Article
Issue	5 : January 1996	View article	View source code
Summary	Brian Long concludes his series by looking at how safe typecasting can make an example project easier to code and more efficient too: a database table viewer
Keywords	$R compiler directive; Forms as resources; Initialising variables; Linking resources; RC files; Resource files; Resource scripts; Typecasting; Typed constants

Surviving Client/Server: TTable vs TQuery
Authors	Steve Troxell		Type: Article
Issue	5 : January 1996	View article	View source code
Summary	Which is best for your project? - Steve Troxell has all the details to help you make an informed decision
Keywords	Client/Server; Dynamic SQL; Generating SQL; Modifiable data sets; Parameterized queries; RequestLive; SQL; SQL prepare; Surviving Client/Server; TQuery; TTable; TTable versus TQuery; Table navigation; Unidirectional

Under Construction: Custom Events
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	5 : January 1996	View article	View source code
Summary	Bob Swart describes how to add custom events and event handlers to your components
Keywords	Building components; Custom events; Event handlers; Event signallers; Message handling; TNotifyEvent; UUEncode & UUDecode; Under Construction column; WM_SETCURSEL; Windows API; Windows messages

Please Call Later...
Authors	Brian Long		Type: Article
Issue	5 : January 1996	View article	View source code
Summary	The second of a three-part series from Brian `Long showing how to use Windows and BDE calbacks
Keywords	BDE; BDE Help file; BDE callbacks; Callbacks; DBIERRS.INT; DBIPROCS.INT; DBITYPES.INT; Database; DbiRegisterCallback; FreeProcInstance; MakeProcInstance; MessageDlg and callbacks; PostMessage / SendMessage; SendMessage; ShowMessage and callbacks; TCallBack; Table changed callback; Thunking; Thunks; WindowState; Windows API; cbTableChanged

Delphi Internals: CPU Type
Authors	Dave Jewell		Type: Article
Issue	5 : January 1996	View article	View source code
Summary	Build a component to identify current and future CPU types with Dave Jewell
Keywords	80386, 80486; Assembler; CPU type; CPUID instruction; Delphi Internals column; GetWinFlags; Intel processor documents; Pentium; Pentium Pro; Processor identification; Windows API

Review: Eschalon Power Controls
Authors	Dave Jewell		Type: Review
Issue	5 : January 1996	View article	No source code
Summary
Keywords	Eschalon power controls; Reviews

Book Review: Delphi How-To
Authors	Steve Troxell		Type: Review
Issue	5 : January 1996	View article	No source code
Summary
Keywords	Book reviews; Delphi How-To; Gary Frerking

Performance Optimisation
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	5 : January 1996	View article	View source code
Summary	Bob Swart continues his series on supercharging your Delphi applications
Keywords	Assembler; BASM; Built in assembler; Callbacks; DLLs; Dynamic methods; Efficiency; Encoding binary files; Exception handling; Exceptions; Exceptions and performance; InLine macros; Linking external assember; LoadLibrary; Loading DLLs; OBJ files; Open arrays; Performance Optimisation; RTTI; Run time type information; UUDecode; UUEncode; Using DLLs; Virtual methods; W8LOSS

Review: Orpheus
Authors	Dave Jewell		Type: Review
Issue	5 : January 1996	View article	No source code
Summary
Keywords	Data entry controls; Data validation; Formatted data entry; Orpheus; Reviews; TurboPower

Radio group focus
Authors	Brian Long		Type: Clinic
Issue	5 : January 1996	View article	View source code
Summary	How to set focus to radio buttons within a radio group
Keywords	ActiveControl; Radio button focus; Radio group; SetFocus

Drag and drop onto DBGRid cells
Authors	Brian Long		Type: Clinic
Issue	5 : January 1996	View article	View source code
Summary	How to drag and drop values onto DBGrid cells
Keywords	DBGrid; Drag and drop; Drag and drop to TDBGrid; Drag and drop to TStringGrid; TStringGrid

256 colour images
Authors	Brian Long		Type: Clinic
Issue	5 : January 1996	View article	View source code
Summary	Bugs displaying 256 colour images using TImage
Keywords	256 colours; Bitmaps; Stretch; Timage and 256 colours

Implementing generic Cliboard support
Authors	Brian Long		Type: Clinic
Issue	5 : January 1996	View article	View source code
Summary	How to implement clipboard support across a number of different controls
Keywords	Clipboard; Generic clipboard support

Control arrays
Authors	Mark Mamone		Type: Tip
Issue	5 : January 1996	View article	View source code
Summary	How to implement Visual Basic style control arrays in Delphi
Keywords	Control arrays; Visual Basic

256 colour bitmaps
Authors	Brian Long		Type: Tip
Issue	5 : January 1996	View article	View source code
Summary	Loading a 256 colour bitmap from a resource
Keywords	256 colour bitmaps; Bitmaps; LoadFromStream; Resource files; Streams; TBitmap; TBitmapFileHeader

Extending TMenu so it can add menu items automatically
Authors	Michael Ax		Type: Tip
Issue	5 : January 1996	View article	View source code
Summary	Extending TMenu so it can add menu items automatically
Keywords	Adding menu items; Menus; TMenu

Processing multiple selections in a listbox
Authors	Margot Nelson		Type: Tip
Issue	5 : January 1996	View article	View source code
Summary	Processing multiple selections in a listbox
Keywords	ExtendedSelect; Listbox; MultiSelect; Multiple selection in listbo; TListbox

Reading database records fast
Authors	Hallvard Vassbotn		Type: Tip
Issue	5 : January 1996	View article	View source code
Summary	How to read a block of records from a table in one go to enhance performance
Keywords	BDE; Database; DbiErrs unit; DbiGetField; DbiProcs unit; DbiReadBlock; DbiTypes unit; Reading blocks of records

Correct handling of WM_EndSession
Authors	Hallvard Vassbotn		Type: Tip
Issue	5 : January 1996	View article	View source code
Summary	Problems with tables not being closed correctly and Paradox lock files not being deleted can be due to incorrect handling by Delphi of the Windows WM_EndSession message
Keywords	HookMainWindow; HookWindow; Lock files not deleted; Message handling; Paradox lock files; TApplication; Table not closed; WM_EndSession; WM_QueryEndSession; WM_Quit; Windows API; Windows messages

Simpler PChars
Authors	Brian Long		Type: Tip
Issue	5 : January 1996	View article	View source code
Summary	A simpler way of implementing PChar types (null terminated strings)
Keywords	Null terminated string; PChar; Simpler PChar

File Handling
Authors	Brian Long		Type: Article
Issue	6 : February 1996	View article	View source code
Summary	Brian Long kicks off a series on working with files in Delphi with a run-down of some of the basics you'll need
Keywords	Assign and AssignFile; BlockRead; BlockWrite; ExistFile; File buffer; File handling; File of ...; File records; File variables; Flush; Read file records; Reset; Rewrite; Seek; SetTextBuffer; System unit; Text and TextFile; Text file buffer; Typed files; Untyped files; Write file records

Under Construction: Property Editors
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	6 : February 1996	View article	View source code
Summary	Bob Swart shows how to add custom property editors to your components, finishing up with a new image property editor you can plug straight into Delphi
Keywords	Building components; DsgnIntf unit; Encoding binary files; GetAttributes; Property editors; RegisterPropertyEditor; TEnumProperty; TPictureEditor; TPropertyAttributes; TPropertyEditor; Tools API; UUdecode; UUencode; Under Construction column; paAutoUpdate; paDialog; paMultiSelect; paReadOnly; paSortList; paSubProperties; paValueList

Enhanced VBX Support
Authors	Stephen Posey		Type: Article
Issue	6 : February 1996	View article	View source code
Summary	Stephen Posey describes how to get more out of Delphi 1.0x's support for VBX controls
Keywords	ChartFX; Enhanced VBX support; TVBXControl; Using VBXs; VBX controls

Surviving Client/Server: Stored Procedures Part 1
Authors	Steve Troxell		Type: Article
Issue	6 : February 1996	View article	View source code
Summary	Steve Troxell begins a two-part examination of using SQL stored procedures and triggers in your client/server applications
Keywords	Client/Server; Data security; ExecProc; Interbase; Open; ParamByName; Params; Prepare for SQL query; SQL; SQL: EXECUTE PROCEDURE; SQL: stored procedures; Security; Stored procedures; Surviving Client/Server; TStoredProc; Triggers; Unprepare for SQL query

Please Call Later...
Authors	Brian Long		Type: Article
Issue	6 : February 1996	View article	View source code
Summary	The concluding part of Brian Long's series showing how to use Windows and BDE callbacks
Keywords	Callbacks; EnableExceptionHandler; InterruptRegister; LocalAlloc; Memory allocation; NotifyRegister; NotifyUnRegister; OutputDebugString; SetMenu; SysUtils unit; TFaultHandler; TFaultResponse; TNfyLogParamError; Thunking; Thunks; ToolHelp DLL; Windows 95; Windows API; dhDebugHooked

Private Investigations
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	6 : February 1996	View article	View source code
Summary	Everything you ought to know about private, public, protected and published declarations but couldn't find in the manual, ably explained by Bob Swart
Keywords	Building components; Class; Component properties; Private keyword; Property keyword; Protected keyword; Public keyword; Published keyword

Delphi Internals: How Not To Write An Operating System
Authors	Dave Jewell		Type: Article
Issue	6 : February 1996	View article	View source code
Summary	Dave Jewell starts assembling a set of useful system-level routines, beginning with floppy disk identification and volume labels
Keywords	32-bits; BIOS; CMOS data; DOS calls; DOS interrupts; Delphi Internals column; Disk drive; DiskSize; FCB; File Control Block; FindFirst; FindNext; GetMID; GetVolumeInformation; GlobalDOSAlloc; Identifying floppy disks; Identifying floppy drives; Intr; Long filenames; MIDINFO; SetMID; SetVolumeLabel; SysUtils unit; TSearchRec; Volume labels; WinDOS unit; Windows 95; Windows API; Windows NT

Building TSmiley
Authors	Nick Hodges		Type: Article
Issue	6 : February 1996	View article	View source code
Summary	If you've been left behind in the component building revolution, get back to basics with Nick Hodges
Keywords	Bitmaps; Building components; Component properties; Design time and run time; Event handlers; LoadBitmap; Mouse handlers; Property editors; RTTI; RegisterPropertyEditor; Run time type information; TComponentState; TMouseEvent; Windows API; property keyword

Delphi Books: A Comparative Overview
Authors	Bob Swart (aka Dr.Bob) , Steve Troxell		Type: Review
Issue	6 : February 1996	View article	View source code
Summary	Bob Swart and Steve Troxell have evaluated 15 Delphi books so you can decide which are the best for your needs - we've even included a database app on the disk with all the reviews in!
Keywords	Book reviews; Delphi 1 books overview

Review: LightLib Images
Authors	Chris Frizelle		Type: Review
Issue	6 : February 1996	View article	No source code
Summary	We take a look at this image handling component library from DFL Software
Keywords	BMP; DFL Software; GIF; Image handling library; JPG JPeg; LightLib Images; PCX; PNG; Reviews; Scanner support; Scanning; TGA; TIF; TWAIN

DDE Server application and service names
Authors	Brian Long		Type: Clinic
Issue	6 : February 1996	View article	View source code
Summary	DDE Server application and service names
Keywords	DDE; DDE Service name; DDE application name; DDEMAN unit; DDEMgr

TDBLookUpCombo.OnClick event
Authors	Brian Long		Type: Clinic
Issue	6 : February 1996	View article	View source code
Summary	TDBLookUpCombo.OnClick event doesn't fire when you click on the drop down list
Keywords	OnClick event; TDBLookUpComboBox

Microsoft products and floating point
Authors	Brian Long		Type: Clinic
Issue	6 : February 1996	View article	View source code
Summary	Incompatibilities between Borland and Microsoft floating point implementation
Keywords	DLLs; Floating point; Microsoft C/C++; Microsoft floating point; NDP stack; Visual Basic

Calling a C DLL
Authors	Brian Long		Type: Clinic
Issue	6 : February 1996	View article	View source code
Summary	Calling a C DLL
Keywords	Calling DLLs written in C; DLLs; Pass by reference; Pointers; const Pass by reference; var Pass by reference

Setting properties en masse
Authors	Brian Long , Roy Nelson		Type: Clinic
Issue	6 : February 1996	View article	View source code
Summary	How to set the same property for multiple components
Keywords	Properties; RTTI; Run time type information; TypInfo unit

Tracing SQL statements
Authors	Brian Long , Steve Axtell		Type: Clinic
Issue	6 : February 1996	View article	View source code
Summary	How to trace the actual SQL statements send by a TTable component
Keywords	BDE; IDAPI section WIN.INI; SQL; SQLTrace in WIN.INI; WIN.INI

Error reading symbol file message
Authors	Brian Long		Type: Clinic
Issue	6 : February 1996	View article	View source code
Summary	Error reading symbol file message
Keywords	Autosave options; Delphi IDE; Error reading symbol file; Symbol file

Easter eggs, credit boxes...
Authors	Brian Long		Type: Clinic
Issue	6 : February 1996	View article	View source code
Summary	Easter eggs, credit boxes...
Keywords	Credit lists; Delphi IDE; Easter eggs

Enumerated and Set types
Authors	Michael Ax		Type: Tip
Issue	6 : February 1996	View article	View source code
Summary	Using enumerated and set types as an alternative to translation tables
Keywords	Enumerated types; GetEnumName; Set types

Using PChar types in components
Authors	Michael Ax		Type: Tip
Issue	6 : February 1996	View article	View source code
Summary	Using PChar types in components
Keywords	Building components; PChar

Object oriented table
Authors	Michael Ax		Type: Tip
Issue	6 : February 1996	View article	View source code
Summary	Object oriented table
Keywords	Object oriented table

Debugging TListbox and TComboBox lists
Authors	Brandon Smith		Type: Tip
Issue	6 : February 1996	View article	View source code
Summary	Debugging TListbox and TComboBox lists
Keywords	Debugging TComboBox; Debugging TListbox; TComboBox; TListbox

Customising forms using CreateParams
Authors	Brian Long , Soenke Pries		Type: Tip
Issue	6 : February 1996	View article	View source code
Summary	Customising forms using CreateParams
Keywords	CreateParams; CreateWindow; Window style flags; Windows API

TNotebook Page Backgrounds
Authors	Stewart McSporran		Type: Tip
Issue	6 : February 1996	View article	View source code
Summary	How to efficiently use a bitmap image as the background to a group of notebook pages
Keywords	OnPageChanged; TNotebook; TNotebook page background

Removing unnecessary code
Authors	Stefan Boether		Type: Tip
Issue	6 : February 1996	View article	View source code
Summary	Removing unnecessary code
Keywords	Removing unnecessary code; TBevel; TLabel

Building A Database Expert
Authors	Marco Cant∙ , Bob Swart (aka Dr.Bob)		Type: Article
Issue	7 : March 1996	View article	View source code
Summary	Marco Cantu and Bob Swart show how to build a 16- and 32- bit database expert
Keywords	Building experts; Class references; Converting classes; CreateModule; Database; Database expert; DatabaseCount; Experts; File streams; GetStyle; GetTableNames; IsValidIdent; Memory streams; OnPageChanged; ReadComponentResFile; Session; Streaming forms; Streams; TFileStream; TIMemoryStream; TMemoryStream; TSession; ToolServices; Typecasting; Valid identifier; WriteComponentResFile

File Handling: Part 2
Authors	Brian Long		Type: Article
Issue	7 : March 1996	View article	View source code
Summary	Brian Long covers error handling for file operations and shows how file and record locking is done
Keywords	$I compiler directive; ERuntimeError; ErrorProc; Exception handling; Exceptions; File error handling; File handles; File handling; File locking; File sharing; File variable record; FileExists; FileMode values; I/O error handling; IOResult error values; LockTable; Long filenames; Record locking; Reset; SHARE.EXE; TFileRec; TTextRec

Surviving Client/Server: Stored Procedures Part 2
Authors	Steve Troxell		Type: Article
Issue	7 : March 1996	View article	View source code
Summary	Steve Troxell concludes his look at SQL stored procedures and triggers
Keywords	Cascading delete; Client/Server; ExecProc; ISQL; InterBase; InterBase script files; Multiple queries; Multiple row result sets; ParamByName; Params; SQL; SQL: CONNECT; SQL: CREATE PROCEDURE; SQL: FETCH; SQL: FOR ... DO; SQL: RETURNS; SQL: SET TERM; SQL: SUSPEND; SQL: stored procedures; Stored procedures; StoredProcName; Surviving Client/Server; TStoredProc

Under Construction: Data-Aware Components
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	7 : March 1996	View article	View source code
Summary	Bob Swart shows how to build your own data-aware controls, using a control to play WAV sound data from BLOB fields as an example
Keywords	Building components; Building data aware controls; Data aware WAV button; Data aware components; DataSet; LoadFromFile; Memory streams; MemoryStream; Multimedia; Sound files; Streams; TDataSource; TMemoryStream; Under Construction column; WAV files; Windows API; sndPlaySound

Review: TOLEAutomationClient
Authors	Micha Somers		Type: Review
Issue	7 : March 1996	View article	No source code
Summary	Micha Somers explains OLE Automation and reviews a component from New Zealand which takes a good deal of the hard work out of implementing it in your own applications
Keywords	MS Excel; MS Word; OLE Automation; OLE mirror classes; Reviews; TOleAutomationClient; Windows API; Word Basic; Word.Basic OLE object

Delphi Intenals: Disk Serial Numbers & CD-ROMs
Authors	Dave Jewell		Type: Article
Issue	7 : March 1996	View article	View source code
Summary	Dave Jewell shows how to get and set disk serial numbers as well as identify CD-ROM drives
Keywords	Assembler; CD ROM detection; CD: program running from?; DOS Interrupts; DPMI; Delphi Internals column; Disk serial number; Drive serial numbers; Floppy disk serial number; GetMid; GetVolumeInformation; GlobalDOSAlloc; Intr; MIDINFO; MSCDEX; Running from CD?; Security; Serial number; SetMid; Windows API

Building A Joystick Component
Authors	Ken Otto		Type: Article
Issue	7 : March 1996	View article	View source code
Summary	Ken Otto explains how to interface joysticks with your Delphi applications using Windows' MMSYSTEM API
Keywords	Building components; GlobalAlloc; GlobalLock; IBM Game Adaptor; Joystick interface; MMSYSTEM DLL; MultiMedia API; SND_ASYNC; Windows API; joyGetDevCaps; joyGetNumDevs; joyGetPos; joySetCalibration; sndPlaySound

Review: Delphi RAD Pack
Authors	Bob Swart (aka Dr.Bob)		Type: Review
Issue	7 : March 1996	View article	No source code
Summary	Bob Swart evaluates Borland's add-on pack for Delphi 1.0 - just how useful is it in your daily development work?
Keywords	Delphi RAD Pack; Resource Expert; Resource Workshop; Reviews; Turbo Debugger; VBX controls; Visual Solutions Pack

YAST: Yet Another Stack Tracer!
Authors	Hallvard Vassbotn		Type: Article
Issue	7 : March 1996	View article	View source code
Summary	Hallvard Vassbotn delves deeply into your programs' operation to show how stack tracing can help in finding those really nasty bugs and presents a code unit you can plug straight in
Keywords	Debugging; Stack dump; Stack frame; Stack tracing

Review: Graphics Server And Light Lib Business
Authors	Chris Frizelle		Type: Review
Issue	7 : March 1996	View article	No source code
Summary	We put these two charting libraries for Delphi through their paces
Keywords	Bits Per Second; Charting Libraries; DFL Software; Data-aware graphs/charts; Graphics Server; Graphing libraries; LightLib Business; Reviews

Changing default size of windows in Delphi IDE
Authors	Brian Long		Type: Clinic
Issue	7 : March 1996	View article	View source code
Summary	Changing default size of windows in Delphi IDE
Keywords	DELPHI.INI; Default IDE window size; Delphi IDE; Object Inspector

TDBLookupList and TDBLookupCombo
Authors	Brian Long		Type: Clinic
Issue	7 : March 1996	View article	View source code
Summary	TDBLookupList and TDBLookupCombo need to be connected to a TTable not a TQuery
Keywords	Database; TDBLookupCombo; TDBLookupList; TTable versus TQuery

$C compiler directive to set segment attributes
Authors	Brian Long		Type: Clinic
Issue	7 : March 1996	View article	View source code
Summary	$C compiler directive to set segment attributes
Keywords	$C compiler directive; MOVEABLE; PERMANENT; PRELOAD; Segment attributes

Creating TField field objects programmatically
Authors	Brian Long		Type: Clinic
Issue	7 : March 1996	View article	View source code
Summary	Creating field objects programmatically without the Field Editor
Keywords	Creating field objects; Dataset Designer; Fields Editor; TField

Raising a number to a power
Authors	Brian Long		Type: Clinic
Issue	7 : March 1996	View article	View source code
Summary	Raising a number to a power
Keywords	Exp; Power function; Raising a number to a power

Windows file access denied error dialog
Authors	Brian Long		Type: Clinic
Issue	7 : March 1996	View article	View source code
Summary	How to disable Windows file error dialog box
Keywords	File Access Denied dialog; File error dialog box; File sharing; FileMode; Windows API

Toggling shift key states
Authors	Brian Long		Type: Clinic
Issue	7 : March 1996	View article	View source code
Summary	Toggling scroll lock, caps lock, num lock key states
Keywords	Caps lock key; GetKeyboardState; Num lock key; Scroll lock key; SetKeyboardState; Windows API

TLabel Enabled property
Authors	Hallvard Vassbotn		Type: Tip
Issue	7 : March 1996	View article	View source code
Summary	Setting TLabel Enabled property to False doesn't grey out the control.
Keywords	Enabled property; FocusControl; FocusEnable; TLabel; TLabel Enabled property; Visible property

Event chains in Delphi
Authors	Stefan Boether		Type: Tip
Issue	7 : March 1996	View article	View source code
Summary	Event chains in Delphi
Keywords	AddExitProc; Event chains; Event handlers; ExitProc

Surviving Client/Server: All About Aliases
Authors	Steve Troxell		Type: Article
Issue	8 : April 1996	View article	View source code
Summary	Steve Troxell explains how to use the TDatabase and TSession components to configure the BDE in your applications
Keywords	Adding an Alias; AliasName; BDE; BDE Configuration Utility; Building DLLs; Client/Server; Commit; Connected; DLLs; Database; Database Aliases; Database DLLs; Database Login dialog; DatabaseName; DbiAddAlias; GetAliasNames; GetAliasParams; GetDriverParams; GetStoredProcNames; GetTableNames; IDAPI.CFG; Rollback; Session; StartTransaction; Surviving Client/Server; SystemTables; TDatabase; TSession; Transaction processing

Structured Exception Handling
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	8 : April 1996	View article	View source code
Summary	Bob Swart gives the lowdown on Delphi's excellent error handling, showing how to use exceptions effectively in your own applications
Keywords	Error handling; Except on ... do ...; Exception handling; Exceptions; OnException; Raise; Raising exceptions; TApplication; TExceptionEvent; Terminate; Try ... Except

File Handling 3: File Handles
Authors	Brian Long		Type: Article
Issue	8 : April 1996	View article	View source code
Summary	Having covered file variables and error handling, Brian Long now turns to using handles to manipulate files in your applications, with details of all the associated routines
Keywords	32-bits; BlockRead; BlockWrite; Errors on record size; File handles; File handling; File seek constants; FileCreate; FileOpen; FilePos; FileSize; FileWrite; Files; GetFileSize; LockFileArea; LockFileVar; Packed records; Seek; SetLength; SysUtils unit; TFileRec; TTextRec; Typed files; Untyped files; WinDos unit; WinProcs unit; Windows API; Windows unit; Writing over 64Kb to file

Under Construction: Component Editors
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	8 : April 1996	View article	View source code
Summary	Bob Swart describes how to make use of Delphi's built-in component editors and shows how to build your own too
Keywords	Building components; Component editors; DSGNINTF unit; ExecuteVerb; GetComponentEditor; GetVerb; GetVerbCount; RegisterComponentEditor; TComponentEditor; Under Construction column

Modelling Systems With Components
Authors	Paul Warren		Type: Article
Issue	8 : April 1996	View article	View source code
Summary	Paul Warren discusses how he used Delphi components to model decision trees and electronic circuits!
Keywords	Building components; Decision trees; Electronic circuit model; Floating point properties; Modelling systems; Properties of Type Real; Property editors; Real type property editor

Delphi Internals: Disk Formatting Basics
Authors	Dave Jewell		Type: Article
Issue	8 : April 1996	View article	View source code
Summary	Continuing his examination of disk fundamentals Dave Jewell explains what makes floppy disks tick and how to read and write to absolute sectors
Keywords	32-bits; Absolute disk read/write; Assembler; BPB; Bios Parameter Block; DOS calls; Delphi Internals column; DeviceIOControl; Disk formatting; Disk lock; Disk sectors; FAT; File allocation table; Floppy disks; GetMessage; Interrupt; Low level disk I/O; PeekMessage; Quick format; Read/write disk tracks; SHELL32.DLL; SHFormatDrive; Volume lock; Windows API

Inside The BDE: Building A Data Dictionary
Authors	Brandon Smith		Type: Article
Issue	8 : April 1996	View article	View source code
Summary	Brandon Smith reveals some of the goodies inside the Borland Database Engine, building a handy data dictionary application for Delphi 1 along the way
Keywords	Aliases; BDE; Creating DBF files; Creating dBase files; Creating databases; Creating fields; Creating tables; Data dictionary; Database; Database alias; Fields Editor; IDAPI; TBlobField; TDatabase; TField; TFloatField; TIntegerField; TSession

A Delphi Bootstrap
Authors	John Braga		Type: Article
Issue	8 : April 1996	View article	View source code
Summary	John Braga describes how he overcame application and BDE configuration problems in developing a diary system for networked users
Keywords	File sharing; Finding windows; Launching applications; Network; Network applications; Shared tables

Review: Image Lib 1.3
Authors	Chris Frizelle		Type: Review
Issue	8 : April 1996	View article	No source code
Summary	ImageLib from Skyline Tools handles the loading, display, manipulation and saving of a multitude of bitmap formats, should it be on your wanted list?
Keywords	AVI files; BMP; Bitmap libraries; GIF; Graphics; ImageLib 1.3; JPG JPeg; MID MIDI files; MOV files; Multimedia; PCX; PNG; Reviews; Scanning; SkyLine Tools; Sound files; TIF; TWAIN; Video files; WAV files; WMF

What tasks are running?
Authors	Brian Long		Type: Clinic
Issue	8 : April 1996	View article	View source code
Summary	How to find out which tasks are running in Windows
Keywords	Running programs; Running tasks; Windows API

Intercepting keystrokes
Authors	Brian Long		Type: Clinic
Issue	8 : April 1996	View article	View source code
Summary	How to intercept keystrokes, eg trap the Enter key and treat it like a Tab key press
Keywords	Enter key; Enter key as Tab key; GetKeyState; Intercepting keystrokes; KeyPreview; Keypresses; OnKeyPress; Tab key; Trapping keystrokes; Windows API

Opening and closing maximised MDI children
Authors	Brian Long		Type: Clinic
Issue	8 : April 1996	View article	View source code
Summary	Opening and closing maximised MDI children
Keywords	MDI; Maximised MDI children; WindowState

Converting times to floats
Authors	Brian Long		Type: Clinic
Issue	8 : April 1996	View article	View source code
Summary	TTimeField and date arithmetic
Keywords	Date arithmetic; Dates and times; TDateTime; TTimeField

Bitmaps for brushes
Authors	Brian Long		Type: Clinic
Issue	8 : April 1996	View article	View source code
Summary	Setting up custom bitmap brushes
Keywords	Bitmaps; Brushes; Custom brushes; TBitmap

Examining the type and value of array elements
Authors	Brian Long		Type: Clinic
Issue	8 : April 1996	View article	View source code
Summary	How to examine the type and value of elements of an array passed to a function or procedure
Keywords	TVarRec; Types of array elements; Value of array elements; Variant records

Table locks
Authors	Brian Long		Type: Clinic
Issue	8 : April 1996	View article	View source code
Summary	Opening Paradox tables with table write locks
Keywords	LockTable; Paradox tables; Printing bitmaps; StretchDIBits; StretchDraw; TLockType; Table locks; UnlockTable; Windows API

Form name property
Authors	Brian Long		Type: Clinic
Issue	8 : April 1996	View article	View source code
Summary	Form's name property gives an empty string when read at run time in Delphi 1
Keywords	Form name property

Lost pointers when an application GPFs
Authors	Goeran Forsstrom		Type: Tip
Issue	8 : April 1996	View article	View source code
Summary	Using Try..Except to keep lost pointers when an application GPFs
Keywords	Exception handling; GPF; Lost pointers

I/O Error handling update
Authors	Brian Long		Type: Tip
Issue	8 : April 1996	View article	View source code
Summary	Update to I/O error handling for Brian's file handling series
Keywords	32-bits; I/O error 21; I/O error 3; I/O error handling Delphi 2; Win32

Hints for modeless forms in DLLS
Authors	Bob Swart (aka Dr.Bob)		Type: Tip
Issue	8 : April 1996	View article	View source code
Summary	Including hints on modeless forms in DLLs
Keywords	Creating DLLs; DLLs; HandleMessage; Hints; Idle method; Modeless forms in DLLs; ShowModal

Is Delphi Running?
Authors	Bob Swart (aka Dr.Bob)		Type: Tip
Issue	8 : April 1996	View article	View source code
Summary	How to tell if Delphi is running
Keywords	Component building; Delphi active?; ExptIntf unit; Is Delphi running?; ToolServices

A Delphi scratchpad
Authors	Michael Ax		Type: Tip
Issue	8 : April 1996	View article	View source code
Summary	A coding scratchpad in the Delphi IDE
Keywords	Delphi IDE; Scratchpad

TDirectoryOutline bug
Authors	Roberto De Marini		Type: Tip
Issue	8 : April 1996	View article	View source code
Summary	FileList of TFileListBox not updated correctly when used with a TDirectoryOutline
Keywords	FileList not updated; TDirectoryOutline bug; TFileListBox

Indexing TParam objects ina TQuery.Params property
Authors	Martin Humby		Type: Tip
Issue	8 : April 1996	View article	View source code
Summary	Indexing TParam objects in a TQuery.Params property
Keywords	Parameterised SQL; SQL; TParam; TQuery.Params

File Handling 4: Streaming Objects
Authors	Brian Long		Type: Article
Issue	9 : May 1996	View article	View source code
Summary	Streams are a very powerful feature of object oriented programming and Brian Long shows how they can be easy too
Keywords	Blob streams; CopyFrom; File handling; File streams; FileSeek; Files; LoadFromStream; Making objects streamable; Memory streams; Resource streams; SaveToStream; Seek; Streaming data; Streaming objects; Streams; TBlobStream; TFileStream; THandleStream; TMemoryStream; TResourceStream; TStream

Performance Optimisation Part 3: 32 bits
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	9 : May 1996	View article	View source code
Summary	Bob Swart returns to the subject of making your applications go even faster with some handy hints on 32-bit specific issues for Delphi 2
Keywords	32-bit assembly; 32-bits; Assembler; Delphi 2; Delphi IDE; Efficiency; Exceptions; Linker options; Optimization; Performance optimisation; Project Options; Typecasting; Typecasting variants; Variants

Custom Coder Utilities
Authors	Stephen Posey		Type: Article
Issue	9 : May 1996	View article	View source code
Summary	Make life easier for yourself by generating code automatically: Stephen Posey shows how with examples for class method skeletons and message boxes
Keywords	Code generation; Code skeletons; Coding utilities; Message Box Designer; MessageBox; Window title

Delphi Internals: Disk Formatting Continued...
Authors	Dave Jewell		Type: Article
Issue	9 : May 1996	View article	View source code
Summary	Dave Jewell promises that next time he'll have this finally all wrapped up!
Keywords	BPB; Bios Parameter Block; DOS calls; Delphi Internals column; Detecting disk type; Detecting drive type; Disk formatting; Disk sectors; Disk tracks; Floppy disk; Formatting disk tracks; Media sensing; Windows API

Under Construction: Components For Workgroups 1
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	9 : May 1996	View article	View source code
Summary	Bob Swart offers useful advice and utilities for component management in a Delphi team development environment
Keywords	Building components; COMPLIB.DPR; CompLib project; Experts; Registering components; Shared component library; Shared experts; Sharing COMPLIB.DCL; Under Construction column; Workgroup development

Type-Safe Lists
Authors	Jim Cooper		Type: Article
Issue	9 : May 1996	View article	View source code
Summary	Jim Cooper gives us the low-down on the TList class and shows how to create type-safe derivatives of it, ending up with a handy expert to automate the task!
Keywords	Building experts; Creating experts; Custom lists; DSGNINTF unit; Experts; List building expert; TComponentList; TList; TStringList; Type safety

Audio-Enabled Components
Authors	Paul Warren		Type: Article
Issue	9 : May 1996	View article	View source code
Summary	Paul Warren develops a WaveAudio player that allows you to embed sound right in your own components or applications: no more pesky .WAV files to ship (and your users to lose!)
Keywords	Audio-enabled components; Building components; Building property editors; Linking sound into apps; Memory streams; Playing sounds; Property editors; Sound; Sound components; Sounds property editor; Streams; TMediaPlayer; TMemoryStream; WAV files

Components Made Easier?
Authors	Mike Orriss		Type: Review
Issue	9 : May 1996	View article	No source code
Summary	Mike Orriss reviews two packages designed to make component development simpler: Component Developers Kit and Component Create
Keywords	Building components; Component Create; Component Developers Kit; Component builders; Eagle Software; Potomac Document Software; Reviews

Review:HyperTerp
Authors	Dave Jewell		Type: Review
Issue	9 : May 1996	View article	No source code
Summary	Dave Jewell evaluates this Pascal-like script language component
Keywords	HyperAct Inc; HyperTerp; Interpreter; Reviews; Script component; Script languages; Scripting

Book Review: The Revolutionary Guide to Delphi 2
Authors	Chris Frizelle		Type: Review
Issue	9 : May 1996	View article	No source code
Summary
Keywords	Book Reviews; Delphi 2 books; Revolutionary Guide Delphi 2

Charts From Tables
Authors	Rashid Ali		Type: Article
Issue	9 : May 1996	View article	No source code
Summary	Rashid Ali describes how to graph data from database tables using the ChartFX VBX included with Delphi 1
Keywords	ChartFX; Charts from database tables; TQuery

Multimedia API: sndPlaySound
Authors	Brian Long		Type: Clinic
Issue	9 : May 1996	View article	View source code
Summary	Multimedia API: sndPlaySound
Keywords	MMSYSTEM unit; Multimedia; Multimedia API; Playing sound files; WAV files; Windows API; sndPlaySound

Ensuring a DOS application has terminated
Authors	Brian Long		Type: Clinic
Issue	9 : May 1996	View article	View source code
Summary	Ensuring a DOS application has terminated
Keywords	Application terminated; Multi-user; Network; Semaphore files; Sharing files; WinExec

OnExit and the lost Caret (text cursor)
Authors	Brian Long		Type: Clinic
Issue	9 : May 1996	View article	View source code
Summary	When switching back to an edit control from a dialog box the caret (text cursor) is lost
Keywords	Focus; Lost caret; Lost text cursor; OnExit; Validation

Error-Free Custom open file dialogs
Authors	Brian Long		Type: Clinic
Issue	9 : May 1996	View article	View source code
Summary	Creating custom file open dialogs using TDirectoryList, TFileListBox and TDriveComboBox
Keywords	Custom file open dialog; EInOutError; File open errors; SetErrorMode; TDirectoryList; TDriveComboBox; TFileListBox; Trapping Windows file errors

Multiple help files
Authors	Brian Long		Type: Clinic
Issue	9 : May 1996	View article	View source code
Summary	Specifying an application's Help file name
Keywords	Application.HelpFile; FindClose; Help files

*Oracle SQLNET 2 and SQL Links**
Authors	Steve Axtell , Brian Long		Type: Clinic
Issue	9 : May 1996	View article	View source code
Summary	Oracle SQL*NET 2 and SQL Links
Keywords	Delphi 1; Oracle SQL*NET 2; SQL Links

Delphi 2 applications won't minimise correctly
Authors	Brian Long , Roy Nelson		Type: Clinic
Issue	9 : May 1996	View article	View source code
Summary	Delphi 2 applications won't minimise correctly if WindowState is set to wsMinimized
Keywords	Delphi 2; Window Minimized; WindowState; wsMinimized

Synchronised Listboxes
Authors	Brian Long		Type: Clinic
Issue	9 : May 1996	View article	View source code
Summary	Synchronising two listboxes
Keywords	Listbox scrolling; Message handling; Synchronised listboxes; TListBox; WM_VScroll; Windows API; Windows messages

Using strings as Case selectors
Authors	Stephen Posey		Type: Tip
Issue	9 : May 1996	View article	View source code
Summary	Using strings as Case selectors
Keywords	Case; GetEnumValue; Strings as Case selectors; Windows API

Changing printer parameters
Authors	William Thorp		Type: Tip
Issue	9 : May 1996	View article	View source code
Summary	Changing printer parameters: paper orientation, number of copies, paper size
Keywords	DevMode; GetPrinter; GlobalLock; Number of copies printed; Paper size; Paper source; Printer parameters; PrinterIndex; Printing; TDevMode; Windows API

Moving components to Delphi 2
Authors	Paul Warren		Type: Tip
Issue	9 : May 1996	View article	View source code
Summary	Moving components to Delphi 2: convert palette bitmap to 32 bit format!
Keywords	32-bits; Building components; Component palette bitmaps; Converting resources 32-bit; DCR file; Delphi 2; Unsupported 16 bit resource

Packing Paradox tables
Authors	Mike Orriss		Type: Tip
Issue	9 : May 1996	View article	View source code
Summary	How to pack Paradox tables
Keywords	BDE; Database; DbiDoRestructure; Packing Paradox tables; Paradox tables; TDatabase

Replacing controls
Authors	Mike Orriss		Type: Tip
Issue	9 : May 1996	View article	View source code
Summary	An easy way to replace one type of control with another
Keywords	Replacing controls

MaxLength of DBEdit doesn't work
Authors	Mike Orriss		Type: Tip
Issue	9 : May 1996	View article	View source code
Summary	MaxLength of DBEdit doesn't work
Keywords	DBEdit; MaxLength DBEdit

Lost cursor after displaying dialogs
Authors	Mike Orriss		Type: Tip
Issue	9 : May 1996	View article	View source code
Summary	Lost cursor after displaying dialogs
Keywords	Lost cursor; OnExit; ShowMessage

Under Construction: Version Control Systems
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	10 : June 1996	View article	View source code
Summary	Bob Swart describes the development of his ViCiouS version control system, showing how you too can develop your very own VCS!
Keywords	Building components; DELPHI.INI; Delphi VCS interface; EXPTINTF unit; Exception handling; Exceptions; GetIDString; Installing VCS; TIVCSClient; TOOLINTF unit; ToolServices; Under Construction column; VCSINTF unit; Version control systems; ViCiouS; Workgroup development

Printing In Delphi: Introducing TPrinter
Authors	Xavier Pacheco		Type: Article
Issue	10 : June 1996	View article	View source code
Summary	Xavier Pacheco starts a new series on adding printing capabilities to your Delphi 2 applications with a run-down of the basics
Keywords	AssignPrn; Bitmaps; Fonts; Page orientation; Page size; Paper orientation; Paper size; Printer capabilities; Printer resolution; Printers unit; Printing; Printing Bitmaps; Printing rich text; Printing text; RTF; Rich text format; TPrinter; TPrinter Canvas

Surviving Client/Server: SQL Performance Tuning
Authors	Steve Troxell		Type: Article
Issue	10 : June 1996	View article	No source code
Summary	Steve Troxell shows how to make your client/server apps run at optimum speed
Keywords	Client/Server; Clustered indexes; Cost-Based Optimizers; Indexes; Indices; InterBase; MS SQL Server; Optimisation; Query optimizers; SQL; SQL execution plans; SQL performance tuning; SQL queries; SQL tuning; SQL: NATURAL; SQL: SET STATISTICS; SQL: UPDATE STATISTICS; Surviving Client/Server

Book Review: Borland's Official No-Nonsense Guide To Delphi 2
Authors	Bob Swart (aka Dr.Bob)		Type: Review
Issue	10 : June 1996	View article	No source code
Summary
Keywords	Book Reviews; Delphi 2 books; Michelle Manning; No Nonsense Guide Delphi 2

File Handling 5: Streaming Components
Authors	Brian Long		Type: Article
Issue	10 : June 1996	View article	View source code
Summary	Amongst other things, Brian Long shows how to enable your programs to have an autosaving desktop
Keywords	32 bits; DFM files; Delphi 2; File Handling; File copy using streams; File copying; Files; Form files; LoadFromStream; Persistent objects; RTTI; ReadComponent; Run time resource streams; Run time type information; SaveToStream; Saving application status; Saving the desktop; Streaming components; Streams; TFileStream; TPersistent; TWriter; WriteComponentResFile

Delphi Internals: Disk Formatting Completed
Authors	Dave Jewell		Type: Article
Issue	10 : June 1996	View article	View source code
Summary	The final instalment in Dave Jewell's marathon and there's an example program on the disk to prove it!
Keywords	Boot sector; Callbacks; DOS calls; Delphi Internals column; Disk directory; Disk formatting; FAT; File Allocation Table; Floppy disks; Strings unit; WinDOS unit; Windows 95; Windows API; Windows NT

Component Lists: TCollection And TCollectionItem
Authors	Xavier Pacheco		Type: Article
Issue	10 : June 1996	View article	View source code
Summary	Using a pie chart creator as an example, Xavier Pacheco shows how to build component lists using these components
Keywords	Building components; Collections; Collections of components; Component lists; Property Editors; TCollection; TCollectionItem

Implementation Of A Single Instance Class
Authors	John Chaytor		Type: Article
Issue	10 : June 1996	View article	View source code
Summary	John Chaytor shows how to ensure that no more than one instance of a class can be created in your applications
Keywords	Building components; Class constructors; Class method constructor; Class methods; Creating a class only one; Deriving classes; Event handlers; Events; Single instance class

Review: EMS Shareware Delphi Library on CD
Authors	Bob Swart (aka Dr.Bob)		Type: Review
Issue	10 : June 1996	View article	No source code
Summary
Keywords	Delphi Shareware; EMS Delphi CD; EMS Professional Shareware; EMS Shareware Library; Reviews

Chasing Objectivity With TDBNavigator
Authors	Robert Palomo		Type: Article
Issue	10 : June 1996	View article	View source code
Summary	Sometimes object-oriented just isn't the way to go... Robert Palomo describes how he implemented a custom navigator control with BDE error checking
Keywords	BDE; BDE error codes; DBCTRLS unit; Database; Database error handling; EDBEngineError; Extended TDBNavigator; Extending components; Inheritance; Object Orientation; TDBNavigator; Table navigator

TOutline bug
Authors	Brian Long		Type: Clinic
Issue	10 : June 1996	View article	View source code
Summary	TOutline bug: spurious list out of bounds exception
Keywords	Delphi 1 bugs; Delphi 2 bugs; List out of bounds; TOutline bug

MinValue and MaxValue Bugs in MATH unit
Authors	Brian Long		Type: Clinic
Issue	10 : June 1996	View article	View source code
Summary	MinValue and MaxValue Bugs in MATH unit
Keywords	MATH unit bugs; MaxValue bug; MinValue bug

Autosizing TDBGrid
Authors	Brian Long		Type: Clinic
Issue	10 : June 1996	View article	View source code
Summary	How to make a DBGrid to automatically size itself so that no white space is left at the right
Keywords	Automatically size DBGrid; BDE; DBGRid autosizing; Database; TDBGrid autosizing

Prevent user adding new record in TDBGrid
Authors	Brian Long		Type: Clinic
Issue	10 : June 1996	View article	View source code
Summary	Prevent user adding new record in TDBGrid
Keywords	BDE; DBGRid; Database; Prevent add new record; TDBGrid

Reading a form's properties
Authors	Brian Long		Type: Clinic
Issue	10 : June 1996	View article	View source code
Summary	How to read a form's properties from a non-Delphi program
Keywords	DFM files; Form files; Form properties

Optimising TPaintBox painting
Authors	Brian Long		Type: Clinic
Issue	10 : June 1996	View article	View source code
Summary	Optimising TPaintBox painting by repainting only the changed portion of the graphic
Keywords	Message handling; Optimising TPaintBox Paint; TGraphicControl; TImage; TPaintBox; TSpeedButton; TWinControl; Windows API; Windows messages; wm_Paint

Restricting access to properties
Authors	Brian Long		Type: Clinic
Issue	10 : June 1996	View article	View source code
Summary	Restricting access to properties
Keywords	Building components; Properties; Read only properties; Restricting property access; published

General help page
Authors	Brian Long		Type: Clinic
Issue	10 : June 1996	View article	View source code
Summary	General help page
Keywords	Adding Help; Context sensitive help; Help; Windows Help files

Hiding TTabbedNotebook pages
Authors	Brian Long , Roy Nelson		Type: Clinic
Issue	10 : June 1996	View article	View source code
Summary	Hiding TTabbedNotebook pages
Keywords	Disabling notebook pages; Hiding notebook pages; Showing notebook pages; TPageControl; TTabControl; TTabPage; TTabbedNotebook

Packing dBase tables
Authors	Richard Smith		Type: Tip
Issue	10 : June 1996	View article	View source code
Summary	Packing dBase tables
Keywords	BDE; DBF files; Database; DbiDoRestructure; DbiPackTable; Packing dBase tables

Changing TEdit text in the OnChange event handler
Authors	Bruno Sonnino		Type: Tip
Issue	10 : June 1996	View article	View source code
Summary	Changing TEdit text in the OnChange event handler
Keywords	OnChange event handler; TEdit text

Reading text files as binary
Authors	Mike Rogers		Type: Tip
Issue	10 : June 1996	View article	View source code
Summary	Reading text files as binary
Keywords	Files; Reading text files as binary; Text files

Naming forms and units to prevent name clashes
Authors	Tung Wai Yip		Type: Tip
Issue	10 : June 1996	View article	View source code
Summary	Naming forms and units to prevent name clashes
Keywords	Form and unit name clashes; Naming forms and units

Unique values only in TDBLookUpCombo
Authors	Mike Orriss		Type: Tip
Issue	10 : June 1996	View article	View source code
Summary	Unique values only in TDBLookUpCombo
Keywords	QBE queries; Query by example; TDBLookUpCombo; TDBLookUpCombo unique values; Using QBE as a TTable source

Calling forms using a string variable whose value is form type
Authors	Mike Orriss		Type: Tip
Issue	10 : June 1996	View article	View source code
Summary	Calling forms using a string variable whose value is form type
Keywords	Calling forms with string; Forms

Changing a form's mode
Authors	Mike Orriss		Type: Tip
Issue	10 : June 1996	View article	View source code
Summary	Changing a form's mode
Keywords	Changing form mode; Forms; OnStateChange; TDataSource

Does a record have any empty fields?
Authors	Mike Orriss		Type: Tip
Issue	10 : June 1996	View article	View source code
Summary	Does a record have any empty fields?
Keywords	BDE; Database; Empty fields

Duplicating data from previous record
Authors	Mike Orriss		Type: Tip
Issue	10 : June 1996	View article	View source code
Summary	Duplicating data from previous record
Keywords	Data entry; DataSource; Database; Duplicating previous record; OnDataChange; Shadow tables

Beating The System: Thunking For Profit And Pleasure
Authors	Dave Jewell		Type: Article
Issue	11 : July 1996	View article	View source code
Summary	How to call 16-bit code in 32-bit Delphi 2 applications and vice-versa
Keywords	32-bit; Assembler; Beating The System column; COMMCTL32.DLL; CallProc32W; CallProcEx32; Calling 16-bit code in 32-bi; Calling DLLs; DLLs; Flat Thunk; FreeLibrary; FreeLibraryEx32; Generic Thunk; GetFocus; GetProcAddress; GetProcAddress32W; GetVDMPointer32W; GlobalFix; GlobalLock; GlobalMemoryStatus; InitCommonControls; KERNAL32.DLL; LoadLibrary; LoadLibraryEx32; QT_Thunk; SendMessage; TFarProc; Thunking; Thunks; Universal Thunk; Using DLLs; Win32s; Win95 Progress Bar in 16bit; Windows 95; Windows API; Windows NT

File Handling 6: Text File Device Drivers
Authors	Brian Long		Type: Article
Issue	11 : July 1996	View article	View source code
Summary	Final installment of Brian's series on file handling, which describes how to use text file device drivers and also presents a handy debugging utility
Keywords	AssignFile; AssignPrn; CloseFunc; Console mode; Debugging; Debugging utility; File error handling; File handling; Files; FlushFunc; I/O errors; InOutFunc; OpenFunc; SysUtils unit; TTextRec; Text file device drivers; TextFile; WinCRT

Surviving Client/Server: InterBase or SQL Server?
Authors	Steve Troxell		Type: Article
Issue	11 : July 1996	View article	No source code
Summary	Borland InterBase and Microsoft SQL Server database servers compared
Keywords	ANSI SQL92 Conformance; Database servers; Domains; InterBase; InterBase versus SQL Server; Record locking; SQL; SQL Server; Stored procedures; Surviving Client/Server; TTable versus TQuery; Table locking; Temporary tables; Transaction processing; Triggers

Designing An Article Index Database System
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	11 : July 1996	View article	View source code
Summary	Bob describes the design and implementation of The Delphi Magazine's Article Index Database.
Keywords	Article index database; Avoiding use of Alias; Calculated fields; Data design; Database; Database form expert; Designing database system; Joining tables; Referential integrity; SQL; SQL queries; SQL: OR bug?; SQL: ORDER BY; TQuery

Review: BoundsChecker 4.0
Authors	Dave Jewell		Type: Review
Issue	11 : July 1996	View article	No source code
Summary
Keywords	BoundsChecker 4.0; Debugging; Delphi 2 debugging; Detecting memory leaks; Memory access checks; NuMega; Pointer checking

Under Construction: What's New?
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	11 : July 1996	View article	View source code
Summary	Update on sharing a component library within a workgroup with new ideas and utilities
Keywords	Building components; Sharing COMPLIB.DCL; Sharing component library; Under Construction column; Workgroup development

Review: CADET
Authors	Mike Orriss		Type: Review
Issue	11 : July 1996	View article	No source code
Summary
Keywords	CADET; CASE tools; Creating tables; Data design; ObjectWare; Reverse engineering; Reviews

Printing In Delphi: Printing To Scale
Authors	Xavier Pacheco		Type: Article
Issue	11 : July 1996	View article	View source code
Summary	Printing in Delphi using sensible units like centimetres and inches
Keywords	32-bits; Delphi 2; GetDeviceCaps; Mapping modes; Printing; Printing to scale; SetMapMode; TCanvas; WindowsAPI

Book Review: Delphi Programming Problem Solver
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	11 : July 1996	View article	No source code
Summary
Keywords	Book Reviews; Neil Rubenkink

Hooking Heapcheck
Authors	Hallvard Vassbotn		Type: Article
Issue	11 : July 1996	View article	View source code
Summary	Hallvard takes a little-documented and seemingly useless callback hidden away in Delphi 1 and turns it into a really useful heap debugging tool.
Keywords	Assembler; Callbacks; Debugging; Heap memory; HeapCheck; HeapLimit; Memory allocation; Memory de-allocation; Memory leaks; Pointer checking; Windows API

Paradox tables on a CD
Authors	Brian Long , Roy Nelson		Type: Clinic
Issue	11 : July 1996	View article	View source code
Summary	How to put Paradox tables onto a (read-only) CD-ROM
Keywords	BDE; CD-ROM; Database; DbiGetSysConfig; Directory lock; Paradox; Paradox lock files; TSession

Multi Record Objects: Using TDBCtrlGrid
Authors	Brian Long		Type: Clinic
Issue	11 : July 1996	View article	View source code
Summary	How to place TDBImage and TDBMemo controls into a Delphi 2 TDBCtrlGrid
Keywords	Database; Delphi 2; Multi record objects; TDBCtrlGrid; TDBImage; TDBMemo

Copying Tables
Authors	Brian Long		Type: Clinic
Issue	11 : July 1996	View article	View source code
Summary	How to copy tables using TBatchMove and create the required index files too
Keywords	BDE; BatchMove; Copying index files; Copying tables; Creating index files; Database; TBatchMove

Why is Delphi 2 so slow?
Authors	Danny Thorpe , Brian Long		Type: Clinic
Issue	11 : July 1996	View article	View source code
Summary	Why is Delphi 2 so slow?
Keywords	32-bit compiler; 32-bits; BDE; Delphi 2 is slow?; New DCU format; New unit file format; Windows 95; Windows NT

DataList utility
Authors	Glenn Shukster		Type: Tip
Issue	11 : July 1996	View article	View source code
Summary	Example project inlcuded with Delphi 1 which shows tables, field names etc.
Keywords	BDE; DataList; Database; Index files

Determine if WAV audio is supported on a system
Authors	Paul Warren		Type: Tip
Issue	11 : July 1996	View article	View source code
Summary	Determine if WAV audio is supported on a system
Keywords	Audio installed?; MMSYSTEM unit; Sound; WAV audio; waveOutGetNumDevs

Project history list
Authors	Rohit Gupta		Type: Tip
Issue	11 : July 1996	View article	View source code
Summary	Add more projects to the Delphi IDE project history list
Keywords	DELPHI.INI; Delphi IDE; Project history list

Auto-increment off track
Authors	Mike Orriss		Type: Tip
Issue	11 : July 1996	View article	View source code
Summary	How to fix auto-increment fields which have got off track
Keywords	Auto-increment fields; BDE; Database; Key violation error; Paradox

Setting the cursor
Authors	Ian Johnson		Type: Tip
Issue	11 : July 1996	View article	View source code
Summary	How to set the mouse cursor throughout an application except for certain controls in an MDI application
Keywords	Cursor; MDI applications; Mouse

TDBGrid cell display
Authors	Mike Orriss		Type: Tip
Issue	11 : July 1996	View article	View source code
Summary	How to display something other than the field contents in a TDBGrid cell
Keywords	Database; GetText; SetText; TDBGrid cell contents

Adding indexes
Authors	Mike Orriss		Type: Tip
Issue	11 : July 1996	View article	View source code
Summary	Fixing Invalid Index/Tag Name errors when adding new indexes to database tables
Keywords	AddIndex; Adding indexes; BDE; Database; Indexes; Invalid Index/Tag name; ixCaseInsensitive; ixCaseSensitive

Using masks with TDBEdit
Authors	Mike Orriss		Type: Tip
Issue	11 : July 1996	View article	View source code
Summary	Using masks with TDBEdit to capitalise the first letter of each word typed
Keywords	Capitalise; Masks; TDBEdit

Ensuring no duplicates appear in a combobox
Authors	Mike Orriss		Type: Tip
Issue	11 : July 1996	View article	View source code
Summary	Ensuring no duplicates appear in a combobox
Keywords	ComboBox; IndexOf; No duplicates in ComboBox

Getting Form Coordinates
Authors	Mike Orriss		Type: Tip
Issue	11 : July 1996	View article	View source code
Summary	Getting Form Coordinates
Keywords	Form coordinates; GetPlacement; Windows API

Delphi 2 DeleteFile type mismatch error?
Authors	Mike Orriss		Type: Tip
Issue	11 : July 1996	View article	View source code
Summary	Delphi 2 DeleteFile type mismatch error?
Keywords	DeleteFile in SysUtils; Deleting files; Delphi 2; FindClose in SysUtils; SysUtils unit; Type mismatch error; Windows API

Beating the System: The Private life of a Winhelp File (Part 1)
Authors	Dave Jewell		Type: Article
Issue	12 : August 1996	View article	View source code
Summary	Dave loves delving inside the undocumented and this month he takes the lid off Windows Help files, showing how , by understanding the format, you can add extra functionality to your apps.
Keywords	MVB format files; WHIFS; WinHelp file system; Windows Help files

Windows 95 Tray Icons
Authors	Marco Cant∙		Type: Article
Issue	12 : August 1996	View article	View source code
Summary	Marco Cant∙ shows how to build your own tray icon applications using System Resources examples.
Keywords	Free memory; GlobalMemoryStatus; Hiding a taskbar icon; Hiding main window; SetForegroundWindow; Shell_NotifyIcon; Tray icon; Win32; Windows 95

The Late Session
Authors	John O'Connell		Type: Article
Issue	12 : August 1996	View article	View source code
Summary	Inside the Borland Database Engine with John O'Connell, who has the low-down on sessions, both single and multiple, and how you can create your own in Delphi 1 and 2 applications.
Keywords	BDE; Direct BDE calls; IDAPI; Multiple sessions; PARADOX.LCK; PDOXUSRS.LCK; Record locks; Session property; TDatabase.Close; TDatabase.Open; TSession; TUpdateSQL; Table locks; dbiCloseSession; dbiOpenSession; dbiSetCurrSession; dbiStartSession

Book Review: Database Developer's Guide with Delphi 2
Authors	Bob Swart (aka Dr.Bob)		Type: Review
Issue	12 : August 1996	View article	No source code
Summary
Keywords	Book reviews; Ken Henderson

Printing in Delphi: Printing an Invoice Report
Authors	Xavier Pacheco		Type: Article
Issue	12 : August 1996	View article	View source code
Summary	Xavier Demonstrates how you can have professional-looking fully formatted reports without using any add-on reporting tools.
Keywords	Font sizes for printing; GetDeviceCaps; GetLineHeight; GetTextMetrics; Pixels per inch; PixelsPerInch error; Printer resolution; Printing; Printing reports; Printing: alignment; Printing: device independent; Printing: page margins; TEXTMETRIC; Win32

Under Construction: A Hex Viewer and Editor
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	12 : August 1996	View article	View source code
Summary	Bob returns to component writing in this month's column, with a viewer and editor for binary files of up to 2Gb!
Keywords	Binary files; Component building; Delphi 2 FileMode bug; Displaying Hexadecimal; Editing huge files; Editor; File sharing; File viewer; FileMode; Grids; Hex editor; Hex viewer; Paging algorithm; Property editors

Calling 16-Bit Code from 32-bit in Windows 95
Authors	Brian Long		Type: Article
Issue	12 : August 1996	View article	View source code
Summary	Brian Long demonstrates how QT_Thunk can get your 16-bit code working in Delphi 2 applications (the techniques described complement Dave Jewell's column last month, which dealt with generic thunks)
Keywords	C calling convention; Calling 16-bit from 32-bit; Flat thunk; Free memory; Free resources; FreeLibrary16; Generic thunk; GetFreeSystemResources; GetProcAddress; GetProcAddress16; GetThreadSelectorEntry; List 16-bit modules; List 16-bit tasks; LoadLibrary16; Locking memory; Memory locks; QT_Thunk; Quick Thunk; Stack frames; System resources; SystemHeapInfo; Thunk compiler; Thunking; Thunktion; ToolHelp; Universal thunk; WOWGetVDMPointer; Win32; Win32s; Windows 95; Windows NT; cdecl

Using a text file device driver as a string parser
Authors	Jon Jacobs		Type: Article
Issue	12 : August 1996	View article	View source code
Summary	String parsing can be a real pain to implement but Jon shows how to make it really easy using a TFDD.
Keywords	File flushing; File mode; File sharing; Parsing strings; String parsing; SysUtils; TTextRec; Text file device drivers

Surviving Client/Server: Cached Updates
Authors	Steve Troxell		Type: Article
Issue	12 : August 1996	View article	View source code
Summary	Steve begins a tour of Delphi 2's new database-related features with this new performance enhancement option.
Keywords	ApplyUpdates; Cached updates; CachedUpdates property; Client/Server; Modifying Read Only results; Result sets; Surviving Client/Server; TDataSet; TDatabase; TUpdateSQL; UpdateRecordTypes; UpdatesPending property

What is the image base option?
Authors	Brian Long		Type: Clinic
Issue	12 : August 1996	View article	View source code
Summary	What is the image base option?
Keywords	DLL memory location; ImageBase; Linker options; Writing DLLs

Floating Point Inaccuracy
Authors	Brian Long		Type: Clinic
Issue	12 : August 1996	View article	View source code
Summary	Floating Point Inaccuracy
Keywords	FLOAT fields; Floating point inaccuracy; InterBase; Precision property; Rounding errors

InterBase BLOb SubTypes and segments
Authors	Brian Long		Type: Clinic
Issue	12 : August 1996	View article	View source code
Summary	InterBase BLOb SubTypes and segments
Keywords	BLOb SubTypes; BLOb segments; InterBase

Raw Printer Access
Authors	Brian Long		Type: Clinic
Issue	12 : August 1996	View article	View source code
Summary	Raw Printer Access
Keywords	Escape; Printer driver PassThrough; Printing; Raw printer access; SpoolFile; Win32; Writing direct to printer

Virtual and Override Clarification
Authors	Brian Long , Allen Bauer , Danny Thorpe		Type: Clinic
Issue	12 : August 1996	View article	View source code
Summary	Virtual and Override Clarification
Keywords	Dynamic; Dynamic method table DMT; Early binding; Late binding; Message handling; Override; Polymorphism; Virtual; Virtual method table VMT

Identifying 32-bit Windows Platforms
Authors	Brian Long		Type: Tip
Issue	12 : August 1996	View article	View source code
Summary	Identifying 32-bit Windows Platforms
Keywords	Identifying Windows 95; Identifying Windows NT; Identifying platform; Win32

ShowModal
Authors	Richard Smith		Type: Tip
Issue	12 : August 1996	View article	View source code
Summary	ShowModal
Keywords	Creating modal forms; ShowModal

Network Directory Exists
Authors	Jaroslav Blaha		Type: Tip
Issue	12 : August 1996	View article	View source code
Summary	Network Directory Exists
Keywords	Directory exists; DirectoryExists; Network directory exists; Networking

Execute and Wait
Authors	Jaroslav Blaha		Type: Tip
Issue	12 : August 1996	View article	View source code
Summary	Execute and Wait
Keywords	Execute DOS program; Execute and wait; Semaphore files; WinExec

Database Flushing
Authors	Mike Pijl		Type: Tip
Issue	12 : August 1996	View article	View source code
Summary	Database Flushing
Keywords	BLOB has been modified error; Flush database; OnAfterPost for TTable; dbiSaveChanges

Default Draw Data Cell
Authors	Mike Pijl		Type: Tip
Issue	12 : August 1996	View article	View source code
Summary	DefaultDrawDataCell
Keywords	DBGrid cell custom format; DefaultDrawDataCell; Highlight DBGrid cells

Digging into IDAPI Part 1
Authors	John O'Connell		Type: Article
Issue	13 : September 1996	View article	View source code
Summary	John O'Connel provides more insights into making direct calls to the BDE to enhance your database applications' capabilities and performance
Keywords	BDE; BDE date format; BDE system status; BDE.INT; CursoPosChanged; DBIERRS.INT; DBIPROCS.INT; DBTYPES.INT; Database handle; Database property; Direct BDE calls; File sharing; IDAPI; IDAPI objects; IDAPI record structure; Locking; Multi user; Private directory; PrivateDir property; Record locks; Record number; Record number component; Sequence number Paradox; TSession; TStoredProc; TTable MoveBy; TTable Refresh; Table cursor position; Temporary TDatabase; UpdateCursorPos; dbiDateDecode; dbiExit; dbiGetCursorProps; dbiGetNetUserName; dbiGetNextRecord; dbiGetRecord; dbiGetRelativeRecord; dbiGetSeqNo; dbiGetSysInfo; dbiGetSysVersion; dbiGeySysConfig; dbiInit; dbiLockType; dbiOpenDatabase; dbiSetDirectory; dbiSetPrivateDirectory; dbiSetToRecordNo; dbiSetToSeqNo

Cascading Exceptions
Authors	Andrew McLellan		Type: Article
Issue	13 : September 1996	View article	View source code
Summary	Andrew McLellan shows how to use Delphi's exception handling to build error handling systems which satisfy the needs of both end users and technical support departments.
Keywords	Cascading exceptions; Creating new error class; Error handling; Error messages; Exception handling; Exceptions; OnException

Surviving Client Server: Delphi 2.0 Potpourri
Authors	Steve Troxell		Type: Article
Issue	13 : September 1996	View article	View source code
Summary	Continuing his look at Delphi 2.o's new database features, this month Steve Troxell rounds off cached updates and covers filters and database dictionaries
Keywords	Cached updates; Client/server; Data dictionary; Dataset filtering; Delphi 2 client/server; Delphi 2 data dictionary; FilterOptions property; Filtered property; Filtering records; Find and Find Next; FindFirst; FindLast; Incremental searches; ModifySQL property; OnFilterRecord event; OnUpdateRecord event; SQL; Searching with filters; Surviving Client/Server; TDataSet; TUpdateSQL; UpdateKind

Data Validation Levels
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	13 : September 1996	View article	View source code
Summary	Bob Swart shows how to build data validation into your applications at input, field, record/table and dialog or application levels.
Keywords	Data validation; Dialog/form validation; Edit masks; EditMask; Field validation; OnValidate; Record validation; Table validation

An "Expert" Expert
Authors	Paul Warren		Type: Article
Issue	13 : September 1996	View article	View source code
Summary	Paul Warren thinks experts are wonderful, so he built an expert to create his own experts!
Keywords	Building experts; CreateModule; ExpIntf; Expert to build experts; Experts; Open Tools API; Proxies; Proxy; TIExpert; ToolIntf

Beating the System: The Private Life of A WinHelp File (Part 2)
Authors	Dave Jewell		Type: Article
Issue	13 : September 1996	View article	View source code
Summary	Dave Jewell continues trawling the depths of Windows Help files, this month explaining how thier data compression system works
Keywords	Beating The System; Compression; Help compression; Help file; Length/distance encoding; Sliding window compression; WHIFS; Windows Help file format

Under Construction: Delphi 2.0 AddIn Experts
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	13 : September 1996	View article	View source code
Summary	Delphi 2.0 has a new, fourth kind of expert and Bob Swart shows how to build your own, and there's even a bug-tracking expert on the free disk!
Keywords	AddIn Experts; BERT; Building experts; DLL experts; Delphi 2.0; EXPTINTF; Error report database; Error report expert; Error tracking; Experts; TIExpert; TOOLINTF; Under Construction

Review: Infopower 2.0
Authors	Mike Orriss		Type: Review
Issue	13 : September 1996	View article	No source code
Summary	Mike Orriss puts the new version of this popular database component toolbox through its paces
Keywords	InfoPower 2.0; Reviews

Book Review: Rapid Development by Steve McConnell
Authors	Richard Stevens		Type: Review
Issue	13 : September 1996	View article	No source code
Summary	Written by Steve McConnell reviewed by Richard Stevens
Keywords	Book reviews; Steve McConnell

File Handle Leak
Authors	Brian Long		Type: Clinic
Issue	13 : September 1996	View article	View source code
Summary	File Handle Leak
Keywords	File handles; FileCreate; Rewrite

Validation en Masse
Authors	Brian Long		Type: Clinic
Issue	13 : September 1996	View article	View source code
Summary	Validation En Masse
Keywords	OnValidate; TDBedit; Validating multiple controls; Validation

Enum As String
Authors	Brian Long		Type: Clinic
Issue	13 : September 1996	View article	View source code
Summary	Enum As String
Keywords	Enumerated type as string; RTTI; Run time type information; TypInfo

CPU Level Debugging
Authors	Brian Long		Type: Clinic
Issue	13 : September 1996	View article	View source code
Summary	CPU Level Debugging
Keywords	Assembler generation; CPU level debugging; Debugging; Delphi 2.0; Registry; Windows 95

Stop Splashing About
Authors	Brian Long		Type: Clinic
Issue	13 : September 1996	View article	View source code
Summary	Modifying the Splash Screen which shows during the load up process
Keywords	/NS on command line; Delphi 2.0; No Delphi 2 splash screen

Form-Wide OnMouseMove
Authors	Brian Long		Type: Clinic
Issue	13 : September 1996	View article	View source code
Summary	Form-Wide OnMouseMove
Keywords	Mouse events all controls; OnMouseMove

Default OLE Automation Property
Authors	Brian Long		Type: Clinic
Issue	13 : September 1996	View article	View source code
Summary	Default OLE Automation Property
Keywords	OLE Automation; OLE Server default property; OLE dispatch ID

Thunk Update
Authors	Brian Long		Type: Tip
Issue	13 : September 1996	View article	View source code
Summary	Thunk Update
Keywords	Call 16-bit code in 32-bit; QT_Thunk; Thunking; Thunking with no assembler; Windows 95

Automatic Initialisation And Finalisation
Authors	Jim Cooper		Type: Tip
Issue	13 : September 1996	View article	View source code
Summary	Automatic Initialisation And Finalisation
Keywords	AddExitProc; Exit procedures; Finalization; Initialization; SysUtils; Unit finalisation; Unit initialisation

Easy Word Wrapping
Authors	Jim Cooper		Type: Tip
Issue	13 : September 1996	View article	View source code
Summary	Easy Word Wrapping
Keywords	DT_WORDBREAK; DrawText; Grids; Word wrapping

One Last Compile...
Authors			Type: Article
Issue	13 : September 1996	View article	No source code
Summary	A humorous look at Delphi training...
Keywords	One Last Compile

Language Extensions: Variants
Authors	Xavier Pacheco		Type: Article
Issue	13 : September 1996	View article	View source code
Summary	How to use the new Variant type in Delphi 2.0
Keywords	Delphi 2; Dynamic data types; Garbage collection; Invalid variant operation; OLE Automation; TVarData; Typecasting variants; Variant arrays; Variant type; Variants; Variants and databases; Variants in expressions

Book review: Building Internet Applications With Delphi 2
Authors	Bob Swart (aka Dr.Bob)		Type: Review
Issue	13 : September 1996	View article	No source code
Summary
Keywords	Book review; Davis Chapman; Internet

Inheritance update
Authors	Brian Long		Type: Clinic
Issue	13 : September 1996	View article	View source code
Summary	Update on Issue 12 discussion of virtual, override and dynamic
Keywords	Dynamic; Inheritance; Inherited; Overrride; Virtual

Surviving Client/Server: Data Processing With Subqueries
Authors	Steve Troxell		Type: Article
Issue	14 : October 1996	View article	No source code
Summary	Steve Troxell shows how to exploit the flexibility of SQL's SELECT statement to build complex and powerful queries.
Keywords	Client/server; Correlated subqueries; Data processing; Duplicate values in rankings; Ranking data; Ranking multiple sequences; SQL; SQL AVERAGE; SQL SELECT; SQL SELECT DISTINCT; SQL nested SELECT; Subqueries; Surviving Client/Server

Customising TDrawGrid For Text Grids
Authors	Steve Tung		Type: Article
Issue	14 : October 1996	View article	View source code
Summary	Steve Tung demonstrates how you can use TDrawGrid to display text and gain useful flexibility along the way.
Keywords	Cutomising grid cells; Drawing grid cell text; ExtTextOut; Grid cell text alignment; Merging grid cells; Mouse handling in grids; Multiple select grid cells; Sorting text grids; Splitting grid cells; TDrawGrid; TStringGrid; Text grids; Text in TDrawGrid

Using Form Components With Delphi 1
Authors	Rohit Gupta		Type: Article
Issue	14 : October 1996	View article	View source code
Summary	Save time by re-using your forms in Delphi 1 with Rohit Gupta's simple to implement tricks.
Keywords	Default form; Form components in Delphi 1; Re-using forms

Digging into IDAPI part 2
Authors	John O'Connell		Type: Article
Issue	14 : October 1996	View article	View source code
Summary	John O'Connell gives us a roundup of cursor properties, including record bookmarks, table rights, un-deleting records, table copying and renaming, packing and re-indexing, completing the picture with an enhanced version of TTable with loads of new functionality.
Keywords	BDE; Bookmarks; Copying tables; Deleted records; Deleting all records; Direct BDE calls; Emptying table; Enhanced TTable; File sharing; Flushing database changes; GetBookmark; GoToBookmark; IDAPI; IDAPI cursor properties list; Indexes; Maintained index; Multi user; Non-maintained index; Open tables count; Packing tables; Paradox field privileges; Paradox table passwords; Paradox table privileges; Rebuilding indexes; Renaming tables; Shared or exclusive table; TBookmark; TIndexDef; TTable enhancements; Table cursor properties; Table indexes; Table passwords; Table rights; Transaction handling; Un-deleting records; bBookmarkStable; bDeletedOn; dbiCompareBookmarks; dbiDoRestructure; dbiEmptyTable; dbiGetBookmark; dbiGetCursorProps; dbiGetIndexDesc; dbiGetTableOpenCount; dbiGetTranInfo; dbiIsTableShared; dbiOPENSHARED; dbiREADONLY; dbiRegenIndex; dbiRegenIndexes; dbiSaveChanges; dbiSetProp; dbiUseIdleTime; dbipackTable; eOpenMode

File Search and Delete Tree
Authors	David Selwood		Type: Article
Issue	14 : October 1996	View article	View source code
Summary	Devid Selwood present some useful routines to delete a whole directory tree and search a directory tree for those elusive files your users have hidden!
Keywords	Deleting directories; Deleting directory tree; Deleting files; FindFirst; FindNext; Finding files; Recursion; Recursive programming; Searching for files

Under Construction: Testing And Debugging
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	14 : October 1996	View article	No source code
Summary	Bob Swart has some useful tips, techniques and guidelines for keeping your components bug-free and finding those few that slip through the net.
Keywords	$APPTYPE CONSOLE; Component building; Component debugging; Component testing; ComponentState; Console applications; Debugging; Delphi 2 and NT 4.0 beta; Design; Design, run time behaviour; Detecting design time; Detecting run time; Error 202 in COMPLIB; Log files; Naming conventions; Object oriented design; Recursion; Stack overflow; Testing; Turbo Debugger; Under Construction; WinCRT; Windows NT 4.0; cdDesigning; reAct component debugger

Printing in Delphi: Getting Printer Information
Authors	Xavier Pacheco		Type: Article
Issue	14 : October 1996	View article	View source code
Summary	Xavier Pacheco is back to unravel the secrets of obtaining details of printer capabilities.
Keywords	Banding; DC_DRIVER; DeviceCapabilities; DeviceCapabilitiesA; DeviceCapabilitiesEx; DeviceCapabilitiesW; GDI32; GetDeviceCaps; GetPrinter; Getting printer information; Printer bins; Printer drivers; Printer fonts; Printer information; Printer paper size; Printer resolution; Printing; TDevMode; TPrinter; TrueType font support; WINSPOOL.DRV; Win32

Beating the System: The Private Life Of a WinHelp File (Part 3)
Authors	Dave Jewell		Type: Article
Issue	14 : October 1996	View article	View source code
Summary	Dave Jewell wraps up his exploration of Help file innards with a discussion of the phrase data; there's a utility on the disk to completely decode Help files too!
Keywords	Beating the System; Decompress help files; Disk formatting; Format disk; Help files; Help phrase file; SHFormatDrive; WHIFS; Win32; Windows 95; Windows Help File format

Turbocharging Database Applications with TLists
Authors	Jonathon Morgan		Type: Article
Issue	14 : October 1996	View article	View source code
Summary	Jonathon Morgan shows how you can make your database applications zip along by transferring frequently referenced tables to TList structures
Keywords	Database; Optimisation; Performance enhancement; TList; TList in database apps

SysTools
Authors	Bob Swart (aka Dr.Bob)		Type: Review
Issue	14 : October 1996	View article	No source code
Summary
Keywords	SysTools; System functions; TurboPower Software

And Do Dilly Dally On The Way
Authors	Brian Long		Type: Clinic
Issue	14 : October 1996	View article	View source code
Summary	And Do Dilly Dally On The Way
Keywords	Delay; Sleep; Win32

Changing Locations
Authors	Brian Long		Type: Clinic
Issue	14 : October 1996	View article	View source code
Summary	Changing Locations
Keywords	Application window position; Initial window position; Position property; Positioning windows; Window location

Tacky Termination
Authors	Brian Long		Type: Clinic
Issue	14 : October 1996	View article	View source code
Summary	Tacky Termination
Keywords	Halt; Screen flicker; ShowMainForm; Terminate

Changing the Default Exception Handler
Authors	Brian Long		Type: Clinic
Issue	14 : October 1996	View article	View source code
Summary	Changing the Default Exception Handler
Keywords	Change exception handler; Default exception handler; Exception handling; Exceptions; OnException; TExceptionEvent

Can't Re-Complie The VCL
Authors	Brian Long		Type: Clinic
Issue	14 : October 1996	View article	View source code
Summary	Can't Re-Compile The VCL
Keywords	Delphi 2; Recompiling VCL; Unit caching; VCL

OLE Method Lost
Authors	Brian Long		Type: Clinic
Issue	14 : October 1996	View article	View source code
Summary	OLE Method Lost
Keywords	DISP_E_UNKNOWNNAME; OLE Automation; OLE Errors Windows 95; OnTimer; Windows95

Showing Modal Forms
Authors	Brian Long		Type: Tip
Issue	14 : October 1996	View article	View source code
Summary	Showing Modal Forms
Keywords	Creating modal forms; Modal forms

TDBNavigator Button Click
Authors	Maarten van den Broek		Type: Tip
Issue	14 : October 1996	View article	View source code
Summary	TDBNavigator Button Click
Keywords	Database; Descending from TDBNavigator; TDBNavigator; TDBNavigator button click

Laptop Battery Status
Authors	Mike Pijl		Type: Tip
Issue	14 : October 1996	View article	View source code
Summary	Laptop Battery Status
Keywords	Laptop battery status; Power management

TStringList Versus TStringCollection
Authors	Hallvard Vassbotn		Type: Tip
Issue	14 : October 1996	View article	View source code
Summary	TStringList Versus TStringCollection
Keywords	Grow; ReadFromFile too slow; SetCapacity; TStringCollection; TStringList

Pointer Notation
Authors	Hallvard Vassbotn		Type: Tip
Issue	14 : October 1996	View article	View source code
Summary	Pointer Notation
Keywords	Pointer notation; ^ operator

Delphi 2 Optimisation
Authors	Hallvard Vassbotn		Type: Tip
Issue	14 : October 1996	View article	View source code
Summary	Delphi 2 Optimisation
Keywords	Case constructs; Compiler optimisation; Delphi 2; Optimisation

Your Delphi 2 Executables are 500kb larger than you think!
Authors	Hallvard Vassbotn		Type: Tip
Issue	14 : October 1996	View article	View source code
Summary	Your Delphi 2 Executables are 500kb larger than you think!
Keywords	Large Delphi 2 EXE files; Memory use; OLE Automation; OLEAUT32.DLL

Are you there?
Authors	Peter Schrade		Type: Tip
Issue	14 : October 1996	View article	View source code
Summary	Are you there?
Keywords	File exists; FileExists problem; FindFirst

TPageControl Accelerators
Authors	Dean Thompson		Type: Tip
Issue	14 : October 1996	View article	View source code
Summary	TPageControl Accelerators
Keywords	Accelerator keys; Delphi 2; TPageControl; TTabSheet

One Last Compile...
Authors			Type: Article
Issue	14 : October 1996	View article	No source code
Summary	Delphi books: the lighter side...
Keywords	One Last Compile

Subclassing Windows from EXE files in 16-bit appliccations
Authors	John Chaytor		Type: Article
Issue	15 : November 1996	View article	View source code
Summary	Normally you can only subclass windows from DLLs, John Chaytor shows how to do it from EXE files too.
Keywords	Callbacks; Exported functions; FreeProcInstance; MakeProcInstance; Smart callbacks $K directive; Subclassing

Digging Into IDAPI
Authors	John O'Connell		Type: Article
Issue	15 : November 1996	View article	View source code
Summary	John O'Connell concludes his in-depth investigation of direct BDE calls by discussing table and record locks, in-memory tables and temporary tables
Keywords	BDE; Character set; DBITYPES; Database language driver; Direct BDE calls; Exclusive property; File sharing; IDAPI; IDAPI logical field types; In-memory tables; LOCKS in-memory table; Lock retry period; LockTable; Locking; Multi user; Number of open table cursors; Record locks; Table locks; Temporary tables; UnlockTable; UpdateCursorPos; dbiAnsiToBNative; dbiCreateTempTable; dbiGetNextRecord; dbiGetPriorRecord; dbiGetRecord; dbiGetTableOpenCount; dbiIsRecordLocked; dbiIsTableLocked; dbiNativeToAnsi; dbiOpen... functions list; dbiRelRecordLock; dbiSetLockRetry; dbiSetToBegin; dbiSetToEnd

Under Construction: Delphi 2 and CGI
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	15 : November 1996	View article	View source code
Summary	Bob Swart develops an interactive World Wide Web based version of The Delphi Magazine Book Review Database, showing that developing applications for the Internet is nothing to be scared of!
Keywords	Browser; CGI; CGI database applications; Common Gateway Interface; Environment variables; Generating HTML; HTML; HTML forms; ISAPI; Internet; Internet applications; Intranet; NSAPI; Paradox field types; Under Construction; WinCGI; Windows NT; World Wide Web

Integrating C++ classes into Delphi applications
Authors	Mzwanele		Type: Article
Issue	15 : November 1996	View article	View source code
Summary	If you have come to Delphi from C++ you may well have lots of classes you'd like to use in your new Delphi apps -- well, Mzwanele is here to show you how, courtesy of Microsoft's Component Object Model.
Keywords	C calling convention; C++; C++ classes in Delphi; COM; Calling DLLs; Component Object Model; Event handlers in C++; Fastcall calling convention; OLE Automation; OWL classes in Delphi; Pascal calling convention; VTBL; Virtual function table; Virtual method table

Book Review: Delphi Database Development
Authors	Richard Stevens		Type: Review
Issue	15 : November 1996	View article	No source code
Summary	By Ted Blue, John Kaster, Greg Lief and Loren Scott
Keywords	Book Reviews; Greg Lief; John Kaster; Loren Scott; Ted Blue

Surviving Client/Server: More data processing with SQL
Authors	Steve Troxell		Type: Article
Issue	15 : November 1996	View article	No source code
Summary	This month Steve rounds off his look at SQL's data processing capabilities, covering cross tabs, hierarchical data, case statements and more
Keywords	Advanced SQL; CASE statement in SQL; Client/Server; Cross tabulations; Frequency distributions; Hierarchical data; MS SQL Server; Outline; SQL; SQL CASE; SQL data processing; SQL: COALESCE; SQL: GROUP BY; Surviving Client/Server; Temporary tables

Beating the System: Getting things into context
Authors	Dave Jewell		Type: Article
Issue	15 : November 1996	View article	View source code
Summary	Dave shows how to implement your own add-in context menus for Windows 95 and NT 4.0 Explorer
Keywords	Beating The System; CAB file format; CABVIEW; CLSID; Context menus; DLLs; Explorer; Object-Site Shell Suite; REGEDIT; Registry; Registry files: importing; UUIDGEN.EXE; Win32; Windows 95; Windows NT 4.0; Writing DLLs

Review: MK Query Builder
Authors	Tim Boyd		Type: Review
Issue	15 : November 1996	View article	No source code
Summary	MK Query Builder can be built into your applications to allow end-users to perform custom run time queries and create reports.
Keywords	MK Query Builder; Reviews

Memory Sleuth
Authors	Bob Swart (aka Dr.Bob)		Type: Review
Issue	15 : November 1996	View article	No source code
Summary	Memory Sleuth is a software testing and debugging tool from TurboPower Software
Keywords	Memory Sleuth; TurboPower Software

TDBGrid scrollbar odd behaviour
Authors	Brian Long		Type: Clinic
Issue	15 : November 1996	View article	View source code
Summary	TDBGrid scrollbar odd behaviour
Keywords	Scrollbar TDBGrid; TDBGrid

Paradox picture validation
Authors	Brian Long		Type: Clinic
Issue	15 : November 1996	View article	View source code
Summary	Paradox picture validation
Keywords	EditMask; Paradox tables; Picture validation; Validation

Moving the mouse
Authors	Brian Long		Type: Clinic
Issue	15 : November 1996	View article	View source code
Summary	Moving the mouse
Keywords	Coordinates; Mouse cursor; Moving the mouse cursor; Screen and form coordinates; SetCursorPos

Dropping the combobox
Authors	Brian Long		Type: Clinic
Issue	15 : November 1996	View article	View source code
Summary	Dropping the combobox
Keywords	Combobox; DroppedDown; Dropping combobox

DBGrid row height
Authors	Brian Long		Type: Clinic
Issue	15 : November 1996	View article	View source code
Summary	DBGrid row height
Keywords	DBGrid; Setting DBGrid row height; TStringGrid; Typecasting

Generic field access
Authors	Brian Long		Type: Clinic
Issue	15 : November 1996	View article	View source code
Summary	Generic field access
Keywords	FieldAddress; Generic field access; Help; HelpContext

Paradox passwords
Authors	Brian Long		Type: Clinic
Issue	15 : November 1996	View article	View source code
Summary	Paradox passwords
Keywords	Change table password; Paradox passwords; Paradox tables; Table passwords: setting

Form creation
Authors	Brian Long		Type: Clinic
Issue	15 : November 1996	View article	View source code
Summary	Form creation
Keywords	Create; CreateForm; Form creation

Network user name
Authors	Brian Long		Type: Clinic
Issue	15 : November 1996	View article	View source code
Summary	Network user name
Keywords	GetUserName; Login name; Network user name; User name; WNetGetUser; Win32; Windows user login name; dbiGetNetUserName

Changing boolean display
Authors	Brian Long		Type: Clinic
Issue	15 : November 1996	View article	View source code
Summary	Changing boolean display
Keywords	Boolean; Boolean fields; Changing boolean display

TLists revisited
Authors	Mark Williams		Type: Tip
Issue	15 : November 1996	View article	View source code
Summary	TLists revisited
Keywords	Freeing memory; TList

Showing modal forms
Authors	Glenn Shukster		Type: Tip
Issue	15 : November 1996	View article	View source code
Summary	Showing modal forms
Keywords	Modal forms; Showing modal forms

Rich text on the clipboard
Authors	Stefan Boether		Type: Tip
Issue	15 : November 1996	View article	View source code
Summary	Rich text on the clipboard
Keywords	Clipboard; Clipboard formats; Delphi 2; RTF; Rich text format; Rich text on the clipboard; Win32

Which event?
Authors	Steve Tung		Type: Tip
Issue	15 : November 1996	View article	View source code
Summary	Which event?
Keywords	Event handling; Event sequence; Flow of events; OnCloseQuery

Text file device drivers in 32-bit land
Authors	Jon Jacobs		Type: Tip
Issue	15 : November 1996	View article	View source code
Summary	Text file device drivers in 32-bit land
Keywords	Delphi 2; String parsing; TFDD; Text file device drivers; Win32

One Last Compile
Authors			Type: Article
Issue	15 : November 1996	View article	No source code
Summary	A geek, moi?
Keywords	One Last Compile

Developing Dynamic Web Pages
Authors	Steve Troxell		Type: Article
Issue	16 : December 1996	View article	View source code
Summary	Steve takes us deeper into the creation of Web applications, developing a CGI component that works with both conventional CGI and WinCGI
Keywords	CGI; FastCGI; ISAPI; Internet applications; NSAPI; Standard CGI; URL encoding; WinCGI; World wide web

Introducing Delphi RTTI
Authors	Marco Cant∙		Type: Article
Issue	16 : December 1996	View article	View source code
Summary	Marco reveals some of the hidden secrets in Delphi's run time type information, showing how you can access everything from simple type information to full component property details at run time
Keywords	RTTI; RTTI for classes; RTTI for cursors and colours; RTTI for enumerated types; RTTI for method pointers; RTTI for ordinal types; RTTI for properties; Run time type information; SortPropList; TYPINFO.PAS

Simple Screen Savers
Authors	Paul Warren		Type: Article
Issue	16 : December 1996	View article	View source code
Summary	Paul has a festive treat: create custom screen savers which will impress, complete with sound and animation, using his screen saver expert. Note that additional files for this article are available on our web site at http://members.aol.com/delphimag
Keywords	Animation; Bitmap manipulation; Experts; Gradient fills; HPrevInst; Off-screen drawing; Screen savers; Single instance of program; Sprites

Surviving Client/Server: Managing User Logins, Part 1
Authors	Steve Troxell		Type: Article
Issue	16 : December 1996	View article	View source code
Summary	Steve shows how to build a powerful login manager with password management and audit trail capabilities
Keywords	Audit trail; Client/server; Data modules; Login; Login manager; Logon; Password control; SQL: CREATE TABLE; Surviving Client/Server; TDatabase

Under Construction: Knowledge Based Solutions
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	16 : December 1996	View article	View source code
Summary	Bob's specialist area is knowledge based systems and here he explains how to create simple but powerful rule based systems using both forward and backward chaining. This is the first of a 2-part series.
Keywords	Artificial intelligence; Backward chaining; Disk full error with Delphi; Expert systems; Forward chaining; Inference engine; Knowledge based systems; Rule based systems; Under Construction

Beating The System: Code Generation and Optimisation
Authors	Dave Jewell		Type: Article
Issue	16 : December 1996	View article	No source code
Summary	Dave delves into the innards of Delphi's code generator to demonstrate how to write more efficient applications
Keywords	Beating The System; Case statement; Code generator; Efficiency; Format routines; Get-Set procedures; Machine code; Open arrays; Optimisation; With statement

Hints With Attitude
Authors	Brian Long		Type: Article
Issue	16 : December 1996	View article	View source code
Summary	Brian explains how to customise your hint windows, even changing the window shape
Keywords	ActivateHint; CM_TEXTCHANGED message; Custom hint shape; Hint window; HintWindowClass; Hints; Hints in status bar; OnHint; Pipe character in hint (\|); ShowHint; THintWindow; ToolTip window; ToolTips

Book Review: Delphi 2 Developers Guide
Authors	Richard Stevens		Type: Review
Issue	16 : December 1996	View article	No source code
Summary	Written by Xavier Pacheco and Steve Teixeira
Keywords	Book reviews; Steve Teixeira; Xavier Pacheco

One Last Compile...
Authors			Type: Article
Issue	16 : December 1996	View article	No source code
Summary	Programmers are from Mars, users are from Alpha Centauri
Keywords	One Last Compile

FileMode Failure
Authors	Brian Long		Type: Clinic
Issue	16 : December 1996	View article	View source code
Summary	FileMode Failure
Keywords	ERROR_SHARING_VIOLATION; FileMode bug Delphi 2; SYSTEM unit bugs Delphi 2; _ResetFile

System Modal Forms
Authors	Brian Long		Type: Clinic
Issue	16 : December 1996	View article	View source code
Summary	System Modal Forms
Keywords	Making forms system modal; SetSysModalWindow; ShowModal; Stop application switching; Windows API; System modal forms

System Error Message
Authors	Brian Long		Type: Clinic
Issue	16 : December 1996	View article	View source code
Summary	System Error Message
Keywords	CreateProcess; ERROR_BAD_EXE_FORMAT; GetLastError; Getting error message text; SysErrorMessage; SysUtils unit

Waiting for Termination
Authors	Brian Long		Type: Clinic
Issue	16 : December 1996	View article	View source code
Summary	Waiting for Termination
Keywords	CreateProcess; Executing external program; GetModuleUsage; ShellExecute; ShellExecuteEx; WaitForSingleObject; Waiting for launched program; Win32; WinExec

Single instance only
Authors	Brian Long		Type: Clinic
Issue	16 : December 1996	View article	View source code
Summary	Single instance only
Keywords	32-bit; Atoms; Detecting previous instance; GlobalAddAtom; GlobalDeleteAtom; GlobalFindAtom; HPrevInst; Semaphore API; Single instance of program; Win32

Thunking update
Authors	Brian Long		Type: Clinic
Issue	16 : December 1996	View article	View source code
Summary	Thunking update
Keywords	Calling 16-bit from 32-bit; QT_Thunk; Thunking

Memory mapped files
Authors	Stefan Boether		Type: Tip
Issue	16 : December 1996	View article	View source code
Summary	Memory mapped files
Keywords	Boyer Moore; Memory mapped files; Patch programs; Patching EXE files; Searching a buffer; Streams; TFileStream; Text searching; Virtual memory manager; Win32

Smart drag and drop
Authors	Stefan Boether		Type: Tip
Issue	16 : December 1996	View article	View source code
Summary	Smart drag and drop
Keywords	Drag and drop; Drag and drop component; DragAcceptFiles; DragFinish; FindDragTarget; MakeObjectInstance; WM_DROPFILES message

Listbox keyboard miscellanea
Authors	Brian Long		Type: Tip
Issue	16 : December 1996	View article	View source code
Summary	Listbox keyboard miscellanea
Keywords	Listbox keyboard commands; TListBox

Creating a WAV file
Authors	Nick Hodges		Type: Tip
Issue	16 : December 1996	View article	View source code
Summary	Creating a WAV file
Keywords	Creating WAV files; MCISendCommand; MMSYSTEM unit; Sound; TMediaPlayer; TWaveHeader; WAV files

Multi-Threaded Database Access With Delphi 2.0
Authors	Neil McClements		Type: Article
Issue	17 : January 1997	View article	View source code
Summary	How to use threads to good effect in your 32-bit database applications.
Keywords	32-bit; BDE; Callback threads; Database applications; Multi-Threading; Priority of threads; Spinning cursor; Synchronize threads; TThread; Threaded TDatabase; Threaded database apps; Threads

One Last Compile...
Authors			Type: Article
Issue	17 : January 1997	View article	No source code
Summary	Blazing a trail on the electronic frontier
Keywords	One last compile

Developing Dynamic Web Pages: Part 2
Authors	Steve Troxell		Type: Article
Issue	17 : January 1997	View article	View source code
Summary	Steve describes how to add database support to your Web apps, using TDMAid Online, our own web-based article index database, as an example.
Keywords	BDE; BDE on NT Server with NTFS; CGI; CGI component; Console applications; Database; Exceptions and console apps; Generating HTML; Internet; SQL; World wide web

Book Review: Secrets of Delphi 2 by Ray Lischner
Authors	Dave Jewell		Type: Review
Issue	17 : January 1997	View article	No source code
Summary
Keywords	Book review; Ray Lischner

Under Construction: TRuleBase Component
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	17 : January 1997	View article	View source code
Summary	Bob returns to the theme of knowledge-based systems, developing rulebase and factbase components with supporting property and component editors too.
Keywords	Backward chaining; Certainty factors; Component editors; Database; Expert systems; Factbase; Forward chaining; Inference engine; Knowledge-based systems; Open Tools API; Property editors; Rule-based systems; Rulebase; Under Construction

Beating The System: Code Generation Part 2
Authors	Dave Jewell		Type: Article
Issue	17 : January 1997	View article	No source code
Summary	Dave has more insights into Delphi's code generator, including how try-finally blocks work, exception handling and nested procedures, with a summary of hints for slimmer code.
Keywords	Beating The System; Delphi's code generator; ExceptList; Exception handling; Get-Set routines; Nested procedures; Open arrays; Optimisation; Performance enhancement; With statements; try-except blocks; try-finally blocks

Sharing Data With The Win32 API
Authors	John Chaytor		Type: Article
Issue	17 : January 1997	View article	View source code
Summary	John creates Delphi classes to make data sharing between applications easier, with a full explanation of the API goodies that make it all possible.
Keywords	Accessing resources; CloseHandle; CreateEvent; CreateFileMapping; CreateMutex; CreateSemaphore; Data sharing between apps; Event objects; Kernel objects; MapViewOfFile; Memory mapped files; Mutex objects; ReleaseSemaphore; ResetEvent; Semaphore objects; SetEvent; Shared memory; Signalling; UnMapViewOfFile; WaitForMultipleObjects; WaitForSingleObject; Win32 API

Surviving Client/Server: Managing User Logins, Part 2
Authors	Steve Troxell		Type: Article
Issue	17 : January 1997	View article	View source code
Summary	Steve continues developing his login manager, this month adding support for tracking unsuccessful logins and password management
Keywords	Audit trail; Changing passwords; Client/server; Expired passwords; Login manager; Password management; Surviving Client/Server; Tracking uncuccessful logins

Paradox table corruption
Authors	Brian Long		Type: Clinic
Issue	17 : January 1997	View article	View source code
Summary	Reasons for and fixes for Paradox table corruption
Keywords	BDE; Data loss; Database; Fixing Paradox tables; Local Share; Lost records; Multi-user; Paradox table corruption; Peer to peer networks; Rebuilding indexes; SHARE.EXE; TUtility; VSHARE; Windows for Workgroups; dbiDoRestructure

Debugging DLLs
Authors	Brian Long		Type: Clinic
Issue	17 : January 1997	View article	View source code
Summary	How to debug DLLs, components and experts
Keywords	Debugging DLLs; Debugging components; Debugging experts; Turbo Debugger

Annoying Workgroup Menu
Authors	Brian Long		Type: Clinic
Issue	17 : January 1997	View article	View source code
Summary	How to remove the Delphi 2 Workgroup menu
Keywords	Delphi 2; Registry; Workgroup menu, removing

Making A Unique Key Value
Authors	Brian Long		Type: Clinic
Issue	17 : January 1997	View article	View source code
Summary	Tips on creating unique index key values, and whether you should try
Keywords	Database; Indexing; Unique index keys; Unique key values

The Millenium Bug
Authors	Brian Long		Type: Clinic
Issue	17 : January 1997	View article	View source code
Summary	Displaying database dates with 4-digit years to overcome the so-called millenium bug.
Keywords	4-digit year in dates; Database; Date records; Millenium bug; Year 2000

Bit Manipulation
Authors	Reinhard Greeven		Type: Tip
Issue	17 : January 1997	View article	View source code
Summary	Enhanced bit manipulation class
Keywords	Bit manipulation class; Fake classes

Version information
Authors	Peter J Morriss		Type: Tip
Issue	17 : January 1997	View article	View source code
Summary	Adding version information to EXEs and DLLs
Keywords	Version information in EXEs

3D Window Borders
Authors	Dave Jewell		Type: Tip
Issue	17 : January 1997	View article	View source code
Summary	Adding 3D borders to MDI windows like in Microsoft Apps
Keywords	3D MDI Window borders; 3D Window borders; MDI; WS_EX_CLIENTEDGE; Window style bits

Searching all drives for a file
Authors	Tom Corcoran		Type: Tip
Issue	17 : January 1997	View article	View source code
Summary	Searching all drives for a file
Keywords	Drive list; File search on all drives; Nested procedures; Recursion; Searching for files; Valid drives

Under Construction: Talking DDE To PragMan
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	18 : February 1997	View article	View source code
Summary	Bob develops 16-bit and 32-bit DDE components to work with your Windows environment: creating groups or folders, adding items and so on.
Keywords	32-bit DDE; Adding icons; Building components; Creating groups; DDE; DDE macro commands; DDE parameter packing; DDEML; Dynamic Data Exchange; Explorer; Message handling; PROGMAN; Porting strings to 32-bits; Program Manager; ShortString; Under Construction; WM_DDE_ACK; WM_DDE_DATA; WM_DDE_EXECUTE; WM_DDE_INITIATE; WM_DDE_REQUEST; WM_DDE_TERMINATE; Windows environment; Windows messages

Dynamic Loading And Unloading Of Fonts
Authors	Stewart McSporran		Type: Article
Issue	18 : February 1997	View article	View source code
Summary	If your application uses custom fonts, this article shows how to load them temporarily just for your application and then unload them
Keywords	AddFontResource; CreateScalableFontResource; Dynamic fonts; FOT and TTF files; Font resources; GetTempDrive; GetTempFileName; GetTempPath; Installing fonts; Loading fonts; Locating TEMP directory; Naming temporary files; RemoveFontResource; Temporary files; TrueType fonts; Uninstalling fonts; Unloading fonts; WM_FONTCHANGE

Beating The System: Coolbars - the route to ultra-cool apps
Authors	Dave Jewell		Type: Article
Issue	18 : February 1997	View article	View source code
Summary	How to create CoolBars the ultra-cool way. Note that the disk for this issue also contains two implementations of CoolButtons, one freeware and one shareware.
Keywords	Beating The System; COMCTL32.DLL; COMMCTRL unit; Common control style flags; CoolBars; CreateWindowEx; InitCommonControlsEx; Message handling; MoveWindow; ToolBarWindow32; Windows 95; Windows Common Controls; Windows NT 4.0

A Truly Usable Message Box
Authors	Steven J Colagiovanni		Type: Article
Issue	18 : February 1997	View article	View source code
Summary	How to overcome the problems and limitations of the built-in messsage boxes and learn lots of useful techniques along the way.
Keywords	Add components at run time; Application modal forms; Application.MessageBox; Automatic word breaks; Beeps and sounds; BorderIcons property; Calculate dialog size; Centre form on screen; Centre form over application; Create form at run time; Creating glyphs; Cursor handling; Custom message boxes; DT_CALCRECT; DT_NOPREFIX; DT_WORDBREAK; Disabling System menu items; DrawText; Font sizing; GetSystemMenu; Glyphs in video driver; Include & in text; LoadIcon; Message boxes; Message dialogs; MessageBeep; MessageDlg; MessageDlgPos; Quick beep; RemoveMenu; ShowMessage; ShowMessagePos; Space needed by text; System menu; System modal forms; Text rectangle

Book Review: Delphi Client/Server Developer's Guide
Authors	Steve Troxell		Type: Review
Issue	18 : February 1997	View article	No source code
Summary	Written by Joseph D Booth
Keywords	Book Reviews; Client/Server; Joseph D Booth

Surviving Client/Server: Managing User Logins Part 3
Authors	Steve Troxell		Type: Article
Issue	18 : February 1997	View article	View source code
Summary	Steve concludes his login manager, adding support for database/server overrides and handling multiple databases
Keywords	Aliases; BDE; Changing database at runtime; Changing server at runtime; Client/Server; Login manager; Multiple databases; Overriding database; Overriding server; Surviving Client/Server; TDatabase.AliasName

Managing Your Memory
Authors	David Selwood		Type: Article
Issue	18 : February 1997	View article	View source code
Summary	How to make the most of your precious data segment
Keywords	$M compiler directive; Calculating free DOS memory; Calculating memory use; Data segment; GetFreeSpace; GetFreeSystemResources; Global heap; Local heap usage; Memory management; Setting stack size; Stack usage; Windows heap; Windows task database

One Last Compile...
Authors			Type: Article
Issue	18 : February 1997	View article	No source code
Summary	Leading from the back
Keywords	One last compile...

Generic MakeMethodInstance For 16/32 Bit Applications
Authors	John Chaytor		Type: Article
Issue	18 : February 1997	View article	View source code
Summary	How to get at those useful callback routines to support object methods
Keywords	Allocating memory; Callbacks; Convert method to function; Creating machine code; Executable memory; Executing memory; Hidden Self variable; Inserting into stack; Intel machine code; MakeObjectInstance; Manipulating the stack; Object methods; OpCodes; PAGE_EXECUTE_READWRITE; Pascal calling convention; Register calling convention; Scanning a directory; VirtualAlloc; VirtualFree

Explorer-Like DBGrid
Authors	Brian Long		Type: Clinic
Issue	18 : February 1997	View article	View source code
Summary	Column-sorting column headers for DBGrid like Windows Explorer
Keywords	Column headers; DBGrid; Self--sorting columns; Sorting columns; SysHeader32; SysListView32; THeaderControl; TListView; Windows Explorer

Clearing contents of a TIMage
Authors	Brian Long		Type: Clinic
Issue	18 : February 1997	View article	View source code
Summary	How to clear a TImage's contents at runtime
Keywords	Clearing contents of TImage; Freeing TImage resources

Storing bitmap image in form file
Authors	Brian Long		Type: Clinic
Issue	18 : February 1997	View article	View source code
Summary	Storing bitmap image in form file
Keywords	Bitmap property editors; Storing bitmap in form file; Storing image in form file; TPicture

Edit mask hang bug
Authors	Brian Long		Type: Clinic
Issue	18 : February 1997	View article	View source code
Summary	Edit mask hang bug
Keywords	Edit mask bug; TEditMask bug and fix

Using Object Browser
Authors	Brian Long		Type: Clinic
Issue	18 : February 1997	View article	View source code
Summary	Using Object Browser
Keywords	Symbol information; Using Object Browser

Implementing a splitter
Authors	Brian Long		Type: Clinic
Issue	18 : February 1997	View article	View source code
Summary	Implementing a splitter
Keywords	Implementing a splitter; Splitter component; TSplitControl

Stay on top watch window
Authors	Brian Long		Type: Clinic
Issue	18 : February 1997	View article	View source code
Summary	Stay on top watch window
Keywords	Keep watch window on top; Keep window on top; NormalizeTopMosts; Stay on top; Stay on top watch window

Unique key values (update from Issue 17)
Authors	Brian Long		Type: Clinic
Issue	18 : February 1997	View article	View source code
Summary	Unique key values (update from Issue 17)
Keywords	Index keys; Unique key values; Update from Issue 17

Single instance only (update from Issue 16)
Authors	Brian Long		Type: Clinic
Issue	18 : February 1997	View article	View source code
Summary	Single instance only (update from Issue 16)
Keywords	Single instance; Update from Issue 16

TDBGrid Columns
Authors	Roberto De Marini		Type: Tip
Issue	18 : February 1997	View article	View source code
Summary	TDBGrid columns
Keywords	HideEditor; TDBGrid Columns property; TDBGrid bug Delphi 2; WM_HSCROLL message

FreeObject instead of Free
Authors	Reinhard Greeven		Type: Tip
Issue	18 : February 1997	View article	View source code
Summary	FreeObject instead of Free
Keywords	Free an object; FreeObject; Set object pointer to nil

Property Read/Write Fields
Authors	Hallvard Vassbotn		Type: Tip
Issue	18 : February 1997	View article	View source code
Summary	Property Read/Write Fields
Keywords	Property read/write fields

Bug in Delphi 2 ComboBox
Authors	Hallvard Vassbotn		Type: Tip
Issue	18 : February 1997	View article	View source code
Summary	Bug in Delphi 2 ComboBox
Keywords	Bug in Delphi 2 ComboBox; ComboBox bug; SelLength in TComboBox; SelStart in TComboBox

Delphi 2 for loop bug
Authors	Hallvard Vassbotn		Type: Tip
Issue	18 : February 1997	View article	View source code
Summary	Delphi 2 for loop bug
Keywords	Delphi 2 for loop bug

Generating compile date
Authors	Thilo Bretschneider		Type: Tip
Issue	18 : February 1997	View article	View source code
Summary	Generating compile date
Keywords	Generating compile date

Environment variables
Authors	The African Chief		Type: Tip
Issue	18 : February 1997	View article	View source code
Summary	Environment variables
Keywords	Environment variables; GetEnvVar for Delphi; PATH

Selecting the component library
Authors	Phil Alexander		Type: Tip
Issue	18 : February 1997	View article	View source code
Summary	Selecting the component library
Keywords	COMPLIB.DCL; DCL files; Selecting component library

Book Review: Delphi 2 Developer's Solutions
Authors	Bob Swart (aka Dr.Bob)		Type: Review
Issue	19 : March 1997	View article	No source code
Summary	Written by Nathan Wallace and Steve Tendon
Keywords	Book Review; Nathan Wallace; Steve Tendon

C++ Builder For Delphi Users
Authors	Brian Long		Type: Article
Issue	19 : March 1997	View article	No source code
Summary	Brian Long has burned the midnight oil doing an in-depth evaluation for us.
Keywords	C++ Builder; C++ and Pascal; C++ language basics; C++ operators; C++ switch statement; Open arrays in C++; RTTI in C++; Sets in C++; Variants in C++

Under Construction: A Delphi 2.01 Debugger
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	19 : March 1997	View article	View source code
Summary	Delphi builds great CGI applications for the internet, now you can easily debug or demo them without a web server using Bob Swart's new CGI debugger,built using the NetManage ActiveX controls which come with Delphi 2.01
Keywords	CGI; Debugging CGI apps; HTML browser; HTML forms; Internet; Internet Solutions Pack; NetManage ActiveX controls; URLs for local files; Under Construction:; Web browser; WinCGI; World wide web

Internet Apps With ISAPI
Authors	Steve Troxell		Type: Article
Issue	19 : March 1997	View article	View source code
Summary	Steve Troxell demonstrates how to use the API for Microsoft's IIS web server to good effect for go-faster internet apps
Keywords	CGI; DLLs; ISAPI; Internet; Internet Information Server; Internet applications; Microsoft IIS; Server callback functions; Web browser; Web server APIs; Web server extensions; World wide web

Beating The System: Managing Desktop Shortcuts
Authors	Dave Jewell		Type: Article
Issue	19 : March 1997	View article	View source code
Summary	Returning to the Win95 / NT4.0 shell, Dave Jewell shows how to add shortcuts onto the desktop from your installation programs
Keywords	Beating The System; CoInitialize; CoUnInitialize; Desktop folder; Explorer COM interfaces; IShellLink; Shell API; Shell link bugs; Shell links; Shortcut description bug; Shortcuts; Windows 95; Windows NT 4

16-Bit Serial Communications
Authors	John Chaytor		Type: Article
Issue	19 : March 1997	View article	View source code
Summary	John Chaytor de-mystifies the Windows 3.1x serial comms API and builds an easy to use Delphi class to get you going
Keywords	Asynchronous communications; Baud rate; COMM.DRV; CTS/RTS flow control; Comm lines status; Convert data to bit stream; DTR/DSR flow control; Device control; Dial; Flow control; Hang up; Hardware flow control; IRQ and Base I/O address; Parity; Serial Data Unit SDU; Serial cable; Serial comms errors; Serial communications; Serial port; UART chip; Windows comms API; Windows serial comms class; Windows serial comms driver

One Last Compile...
Authors			Type: Article
Issue	19 : March 1997	View article	No source code
Summary	Components? I can handle them
Keywords	One Last Compile...

Surviving Client/Server: Customized User Administration
Authors	Steve Troxell		Type: Article
Issue	19 : March 1997	View article	View source code
Summary	Steve Troxell creates a user administration application which you can easily customize and build into your own client/server systems
Keywords	Adding users; Client/server; Database administrator; Login manager; Password administration; RDBMS API; SQL; Stored procedures; Surviving Client/Server; TDatabase; User administration; User security

Review: Anchor-P Copy Protection
Authors	Dave Jewell		Type: Review
Issue	19 : March 1997	View article	No source code
Summary	There are many dongles around, but this one from BL Computer Security comes with a Delphi expert to generate customized interface code for your applications; Dave Jewell gives it the eagle eye
Keywords	Anchor-P Copy Protection; BL Computer Security; Copy protection; Dongle; Experts; Review; Security Key

Window startup mode
Authors	Brian Long		Type: Clinic
Issue	19 : March 1997	View article	View source code
Summary	Window startup mode
Keywords	CmdShow; Delphi 2; Multiple entries in taskbar; Start program minimised; Start program minimized; Taskbar; Window startup mode; WindowState

OCX Deployment
Authors	Brian Long		Type: Clinic
Issue	19 : March 1997	View article	View source code
Summary	OCX Deployment
Keywords	Class not registered; DLLRegisterServer; EOleError; Installing OCX controls; LoadLibrary; OCX Deployment

Oracle packages
Authors	Brian Long		Type: Clinic
Issue	19 : March 1997	View article	View source code
Summary	Oracle packages
Keywords	Oracle 7.2; Oracle packages bug; SQL; SQL Links 3.5; Stored procedures

File finding
Authors	Brian Long		Type: Clinic
Issue	19 : March 1997	View article	View source code
Summary	File finding
Keywords	Callbacks; File finding; FindClose; FindFirst; FindNext; Search for a file; Search for and act on files; TSearchRec

Eating mouse clicks and key presses
Authors	Brian Long		Type: Clinic
Issue	19 : March 1997	View article	View source code
Summary	Eating mouse clicks and key presses
Keywords	Application.ProcessMessages; Eating key presses; Eating mouse clicks

TApplication's missing events
Authors	Jim Cooper		Type: Tip
Issue	19 : March 1997	View article	View source code
Summary	TApplication's missing events
Keywords	CreateForm wrongly declared; Delphi Help file errors; Help links broken; HintHidePause property; HintMouseMessage; HintShortPause property; TApplication missing events; TApplication.CreateHandle; TApplication.HideHint; TApplication.Initialize; TApplication.ShowMainForm; UpdateFormatSettings

Heap checking
Authors	Roberto De Marini		Type: Tip
Issue	19 : March 1997	View article	View source code
Summary	Heap checking
Keywords	Custom memory manager; GetMemoryManager; Heap checker unit; Heap checking; Install memory manager; SetMemoryManager; TMemoryManager

Combo box helpers
Authors	Kent Shaw		Type: Tip
Issue	19 : March 1997	View article	View source code
Summary	Combo box helpers
Keywords	Combo box helpers; Filling DBLookupCombo; Filling TDBComboBox

Data validation, required fields and null values
Authors	Glen Janken		Type: Tip
Issue	19 : March 1997	View article	View source code
Summary	Data validation, required fields and null values
Keywords	BeforePost event; Data validation; Required fields, null values

Beating the System: Explorer-style active buttons
Authors	Dave Jewell		Type: Article
Issue	20 : April 1997	View article	View source code
Summary	Having shown us how to easily create CoolBars, Dave is back with the low-down on making the buttons to go onto them!
Keywords	3D captions; Active button; Beating the system; Button with popup menu; Capturing mouse activity; Component development; Controls with window handle; Cool button; CoolBar; Creating disabled glyphs; Explorer button component; Flat buttons; Internet Explorer; MouseCapture; Popup menus; Rebar; TTimer needs window handle; Transparent colors

One last compile...
Authors			Type: Article
Issue	20 : April 1997	View article	No source code
Summary	Getting by (with a little help from my friends)
Keywords	One last compile...

The Delphi 3 Novelty Store
Authors	Brian Long		Type: Article
Issue	20 : April 1997	View article	No source code
Summary	The first part of an in-depth preview of Delphi 3
Keywords	$DenyPackageUnit; $DesignOnly; $ImportedData; $RunOnly; $WeakPackageUnit; Asian language support; Assertions; BDE 4 with Dephi 3; BDE administrator; BLOb caching; Business insight; CPU window; Code completion; Code insight; Code parameters; Code templates; Component templates; Creating ActiveX controls; Decision Cube; Delphi 3 IDE; Delphi 3 and databases; Delphi 3 compiler directives; Delphi 3 preview; Distributed datasets; EnableCPU in Registry; Explorer style buttons; Expression evaluator; Flat buttons; ISAPI, ISAPI2; JPEG support; Mutex; NSAPI; New Delphi 3 componments; Package collections; Packages; Rebar; Resourcestring; Semaphores; String resources; TAnimate; TChart; TCheckListBox; TCoolBar; TDBNavigator; TDBRichEdit; TDataSet Delphi 3; TDateTimePicker; TDecisionCube; TDecisionGrid; TOpenPictureDialog; TProvider; TSavePictureDialog; TSpeedButton; TSplitter; TStaticText; WideString; Win32Check; WinINET

Surviving Client/Server: User-defined SQL functions
Authors	Steve Troxell		Type: Article
Issue	20 : April 1997	View article	View source code
Summary	How to create user-defined functions for Interbase in Delphi
Keywords	Client/server; DECLARE EXTERNAL FUNCTION; DROP EXTERNAL FUNCTION; Date fields in Interbase; Interbase; Interbase and Delphi types; Interbase built-in functions; Interbase datatypes; Linking DLLs to Interbase; Reading Interbase BLOBs; SQL; Strings in SQL; Surviving client/server; User-defined SQL functions; User-defined functions

Under Construction: Multi-threading in components
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	20 : April 1997	View article	View source code
Summary	How to add multi-threading to components and applications, with tips on concurrent programming
Keywords	Concurrent programming; Creating threads; Dining philosophers problem; Multi-tasking; Multi-threading; Multi-threading in VCL; Mutli-threading efficiency; TThread; TThread.Execute; TThread.Synchronize; Terminating threads; Thread class expert; Thread priority; Thread-safe VCL; Threads; Under Construction

Things you can do with standard controls: the ListBox
Authors	Brian Long		Type: Article
Issue	20 : April 1997	View article	View source code
Summary	How to get more out of TListBox: displaying non-text items, adding tab support, adding horizontal scrollbar
Keywords	ComboBox; CreateParams; CreateWnd; DestroyWnd; Dialog measurment units; GetDialogBaseUnits; Graphics in ListBox; Horizontal scrollbar listbox; Non-text items in ListBox; Owner draw ComboBox; Owner draw ListBox; Owner draw controls; RecreateWnd; Saving listbox contents; Scrolling listbox; TListBox; Tab characters in ListBox; TabStopSupport; lb_SetHorizontalExtent; lbs_SetTabStops; lbs_UseTabStops

Review: Async Professional for Delphi 2.01
Authors	Dave Jewell		Type: Review
Issue	20 : April 1997	View article	No source code
Summary	Review of Async Professional for Delphi serial communications library from TurboPower Software
Keywords	Async Professional; Serial communications; TurboPower Software

Client/Server caching using file streams
Authors	Neil McClements		Type: Article
Issue	20 : April 1997	View article	View source code
Summary	Database client applications can get bogged down accessing rarely-changing data from the server. Neil shows how to overcome this by using file streams to cache such data, presenting cached combobox and cached calendar controls too.
Keywords	Cache; Cached calendar; Cached combo box; Client/server; Data caching; File modes using streams; File streams; LoadFromStream; SaveToStream; TCalendar; TComboBox

Getting Delphi 2 and 3 help files to co-exist
Authors	Brian Long		Type: Clinic
Issue	20 : April 1997	View article	View source code
Summary	Getting Delphi 2 and 3 help files to co-exist
Keywords	Delphi 2 help files; Delphi 3 help files; Registry

Trapping keystrokes in a TCheckBox
Authors	Brian Long		Type: Clinic
Issue	20 : April 1997	View article	View source code
Summary	Trapping keystrokes in a TCheckBox
Keywords	PostMessage; ProcessMessages; SendMessage; Sending messages; TCheckBox; Trapping keypresses; Trapping keystrokes; Windows message handling; cm_WantSpecialKey; cn_KeyDown; wm_GetDialogCode; wm_KeyDown

Property editors for properties of components in DLLs
Authors	Brian Long		Type: Clinic
Issue	20 : April 1997	View article	View source code
Summary	Property editors for properties of components in DLLs
Keywords	Components in DLLs; Property editors

ShellExecuteEx doesn't work under Windows NT
Authors	Brian Long		Type: Clinic
Issue	20 : April 1997	View article	View source code
Summary	ShellExecuteEx doesn't work under Windows NT
Keywords	Calling external programs; Executing external programs; ShellExecuteEx not for WinNT; Windows NT

Direct access to hardware ports
Authors	Brian Long		Type: Clinic
Issue	20 : April 1997	View article	View source code
Summary	Direct access to hardware ports
Keywords	CMOS access; Calling 16-bit DLLs; Device drivers; Direct access to ports; Hardware access; Port access in 32-bit; Port and PortW

Class methods for cleaner, more reliable code
Authors	Stephan Westen		Type: Tip
Issue	20 : April 1997	View article	View source code
Summary	Class methods for cleaner, more reliable code
Keywords	Avoiding global variables; Class methods; Creating forms at runtime

Managing stored procedures
Authors	Stefan Boether		Type: Tip
Issue	20 : April 1997	View article	View source code
Summary	Managing stored procedures
Keywords	CREATE PROCEDURE; DROP PROCEDURE; Installing stored procedures; Managing stored procedures; SQL

Re-opening closed datasets
Authors	Stefan Boether		Type: Tip
Issue	20 : April 1997	View article	View source code
Summary	Re-opening closed datasets
Keywords	Active property not saved; Re-opening closed datasets

Table cloning
Authors	Stefan Boether		Type: Tip
Issue	20 : April 1997	View article	View source code
Summary	Table cloning
Keywords	Mutliple table handles; TTable; Table cloning

BDE Paradox driver bug for BLOB fields of size zero
Authors	Hallvard Vassbotn		Type: Tip
Issue	20 : April 1997	View article	View source code
Summary	BDE Paradox driver bug for BLOB fields of size zero
Keywords	BDE Paradox driver bug; BLOB fields of size zero; CreateTable; Creating Paradox tables; dbiTranslateRecordStructure

Initialized variables
Authors	Rick Hansen		Type: Tip
Issue	20 : April 1997	View article	View source code
Summary	Initialized variables
Keywords	Initialized variables

The Delphi 3 Novelty Store: Part 2
Authors	Brian Long		Type: Article
Issue	21 : May 1997	View article	No source code
Summary	Brian Long returns with the second part of his in-depth preview of Delphi 3, covering the new Common ObjectModel, class interface and OLE Automation features, plus one-step ActiveXs, Active Forms, Web application building and more...
Keywords	Active insight; ActiveForms; COM; COM Classes; Calling conventions; Class Identifier (CLSID); Class factories; Class interface; ClassIDToString; Component Object Model; CreateOLEObject; Creating ActiveX controls; DCOM; Delphi 3; Distributed COM; Dual interface COM object; EIntfCastError; Entera; GuidToString; IDispatch; ISAPI; IUnknown; Interface ID (IID); Interface querying; Interface reserved word; Multiple interfaces; NSAPI; OLE; OLE Automation; OLEnterprise; Open Environment tools; StringToClassID; StringToGuid; TAutoObject; TComObjectFactory; TComServer; TDatasetTableProducer; TGUID; TInterfacedClass; TInterfacedObject; TPageProducer; TQueryTableProducer; TWebDispatcher; Type libraries; Virtual method table (VMT); Web server applications; coclass; safecall

Review: Reporting Tools
Authors	David Sutherland		Type: Review
Issue	21 : May 1997	View article	No source code
Summary	David Sutherland has been closeted away with five of the leading reporting tools for Delphi and is now ready to spill the beans with an in-depth evaluation of Ace Reporter, Piparti Pro, QuickReport, Report Printer Pro and Shazam Report Wizard ─ if you need to build reports this is one review that shouldn't be missed
Keywords	Ace Reporter; Delphi reporting tools; Digital Metaphors; Nevrona; Piparti Pro; QDS; QuickReport; Report Printer Pro; Report components; Report writing tools; Reviews; SCT Associates; Shazam Report Wizard; Shazam Ware

Under Construction: Delphi Wizard Magic
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	21 : May 1997	View article	View source code
Summary	We've made Experts before, but now Bob Swart shows how to turn them into Wizards with an interface consistent with you know who, along with details of how to make Wizards binary compatible with both Delphi and C++Builder!
Keywords	Component templates; Creating Wizards; Creating experts; Delphi 3; Interface guidelines; ShareMem Delphi, C++ Builder; TIExpert; Under Construction; Wizard expert; Wizard interfaces; Wizards for C++ Builder

Reducing Server Load
Authors	Jan Casteels		Type: Article
Issue	21 : May 1997	View article	No source code
Summary	In a client/server application, howyou write and process your SQL statements can have a dramatic affect on the performance of the system, asJan Casteels demonstrates, with of course some practical advice on getting the best results
Keywords	Client/server; Database server load; Network server traffic; Oracle 7; Oracle V$SQLAREA table; Performance tuning; Prepare; Preparing SQL queries; Reducing server memory use; SQL; Server performance analysis; Static and dynamic SQL

One Last Compile: Good programming practices #137: the job ads
Authors			Type: Article
Issue	21 : May 1997	View article	No source code
Summary	Good programming practices #137: the job ads
Keywords	One last compile

Beating the System: Manipulating 16-bit resources
Authors	Dave Jewell		Type: Article
Issue	21 : May 1997	View article	View source code
Summary	There's gold locked away inside all those EXE and DLL files on your system: resources of all kinds, from icons to dialogs, and this month Dave Jewell shows how to go on a resource-mining expedition!
Keywords	Beating the system; ExtractIcon; Extracting resources; Resource tables; Resource types; Resources in DLLs and EXEs; Windows NE file format; Windows New Exexcutable

TCP/IP data transfer with the NetManage TCP ActiveX
Authors	Bill Fisher		Type: Article
Issue	21 : May 1997	View article	View source code
Summary	Since version 2.01 Delphi has includeda set of internet-related ActiveX controls, here Bill Fisher demonstrates how to use the TCP control to transfer bitmaps, sounds and EXE files over a TCP/IP connection, whether it be on your LAN or over the internet
Keywords	Delphi 2 internet controls; Internet applications; NetManage TCP ActiveX; Networks; TCP/IP binary data transfer; Using ActiveX controls

Making StringGrid cells non-selectable
Authors	Brian Long		Type: Clinic
Issue	21 : May 1997	View article	View source code
Summary	Making StringGrid cells non-selectable
Keywords	CanSelect property; Making cells non-selectable; OnSelectCell; Prevent cell highlighting; Selecting StringGrid cells; TStringGrid; goRangeSelect

Setting TComboBox drop-down width
Authors	Brian Long		Type: Clinic
Issue	21 : May 1997	View article	View source code
Summary	Setting TComboBox drop-down width
Keywords	ReleaseHandle; TComboBox drop down width; Typecasting; cb_SetDroppedWidth

Polymorphic procedure calls
Authors	Brian Long		Type: Clinic
Issue	21 : May 1997	View article	View source code
Summary	Polymorhpic prodcedure calls
Keywords	Polymorphic procedure calls; Procedural variables; Procedure types

Interrupting SQL queries
Authors	Brian Long		Type: Clinic
Issue	21 : May 1997	View article	View source code
Summary	Interrupting SQL queries
Keywords	Avoiding huge result sets; Interrupting SQL queries; SQL MAX ROWS

Determining Windows platform: 3.1, Windows 95, Windows NT
Authors	Brian Long		Type: Clinic
Issue	21 : May 1997	View article	View source code
Summary	Determining Windows platform: 3.1, Windows 95, Windows NT
Keywords	Dectecting Windows version; Detecting Windows 95; Detecting Windows NT; Determining Windows platform; GetVersion; GetWinFlags; Getting Win32 build number; Win32Platform

Trapping unwanted double clicks
Authors	Brian Long		Type: Clinic
Issue	21 : May 1997	View article	View source code
Summary	Trapping unwanted double clicks
Keywords	Mouse handling; Trapping double clicks; Unwanted double clicks

Setting system date and time
Authors	Brian Long		Type: Clinic
Issue	21 : May 1997	View article	View source code
Summary	Setting system date and time
Keywords	SetLocalTime; Setting system date and time

Lost carets
Authors	Brian Long		Type: Clinic
Issue	21 : May 1997	View article	View source code
Summary	Lost input carets in edit controls
Keywords	No edit control input caret; OnExit event handlers

Controlling Internet Explorer via OLE Automation
Authors	Alistair Moffat		Type: Tip
Issue	21 : May 1997	View article	View source code
Summary	Controlling Internet Explorer via OLE Automation
Keywords	Internet Explorer; OLE Automation; TWebBrowser

Exceptions in QuickReport
Authors	Richard Smith		Type: Tip
Issue	21 : May 1997	View article	View source code
Summary	Exceptions in QuickReport
Keywords	Exceptions in QuickReport

Vertical fonts in QuickReport
Authors	Richard Smith		Type: Tip
Issue	21 : May 1997	View article	View source code
Summary	Vertical fonts in QuickReport
Keywords	TrueType fonts; Vertical fonts QuickReport

Assigning accelerator keys at runtime
Authors	Tom Corcoran		Type: Tip
Issue	21 : May 1997	View article	View source code
Summary	Assigning accelerator keys at runtime
Keywords	Accelerator keys at runtime; Assigning accelerator keys; Setting accelerator keys

Free disk space on drives over 2Gb
Authors	Peter Hyde		Type: Tip
Issue	21 : May 1997	View article	View source code
Summary	Free disk space on drives over 2Gb
Keywords	DiskFree; DiskSpace; Drives over 2Gb; Free disk space

Filename without extension
Authors	Tom Corcoran		Type: Tip
Issue	21 : May 1997	View article	View source code
Summary	Filename without extension
Keywords	Filename without extension

Run-time location information in Delphi 2
Authors	Vitaly Miryanov		Type: Article
Issue	22 : June 1997	View article	View source code
Summary	Vitaly has some neat tricks to allow you to determine the source file and line number where an error occurred, at run time on your users' machines!
Keywords	Add resource file to EXE; Binding in resources; Error addresses; Error location; Execution order; Include files {$I}; Line number at runtime; Locate errors at runtime; MAP file errors; MAP file format; Order units executed; Public symbols; RC_DATA resources; RTLI; Resource compiler; Runtime location information

Things you can do with standard controls: the TButton
Authors	Brian Long		Type: Article
Issue	22 : June 1997	View article	View source code
Summary	Using the owner draw capabilities of Delphi's controls greatly adds to their flexibility and this month Brian Long shows how to implement owner draw for the humble TButton, adding colours and auto-repeat capabilities
Keywords	Auto-repeating buttons; Changing component owner; Changing component parent; Colored buttons; Coloured buttons; Custom buttons; GetParent; GetWindow; GetWindowLong; Notification messages; OnDrawItem; OnMeasureItem; Owner component; Owner draw; Owner window; Parent component; Parent window; RecreateWnd; TButton; Window creation; cn_Base = $2000; cn_CtlColorBtn; wm_CtlColorBtn; wm_MeasureItem; ws_Popup window style; ws_child window style; ws_overlapped window style

Under Construction: Delphi 3 active forms
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	22 : June 1997	View article	View source code
Summary	Bob Swart shows how to use one of the great new features in Delphi 3, making a Wizard ActiveForm and deploying it on the Web too!
Keywords	Active forms; Active forms and VB4; ActiveForm Wizard; ActiveForms; ActiveForms and VB4; ActiveX, Internet Explorer; Code signing; Creating ActiveX controls; Delphi 3; Deploying ActiveForms; Deploying ActiveForms on Web; DllRegisterServer; Dynamic ActiveForms; IClassFactory; OCX; TAnimate; Under Construction

High-Accuracy timing
Authors	Brian Frost		Type: Article
Issue	22 : June 1997	View article	View source code
Summary	Implementing accurate timing over short periods, or creating an accurate but brief delay, is not at all straightforward in Windows, but Brian Frost has all the answers, plus with a handy application profiling tool as well
Keywords	Accurate delays; Accurate timing; Application profiling; Bios timing; Clock tick; Delay in Borland Pascal; Hardware timer; High-accuracy timing; Interrupt 2F; OpTimer from TurboPower; Profiler; Profiling with oscilloscope; Profiling with printer port; QueryPerformanceCounter; QueryPerformanceFrequency; TTimer; Timing; Virtual timer device VTD

Beating The System: Manipulating 16-bit resources, part 2
Authors	Dave Jewell		Type: Article
Issue	22 : June 1997	View article	View source code
Summary	BLast month Dave Jewell showed us how to extract resources from 16-bit executables, this month he concludes by explaining how to save them into standard icon and bitmap file formats
Keywords	16-bit resources; Beating the System; Bitmap file format; Bitmap resources; Extracting resources; GROUPICON resource; Icon file format; Icon resources; Resources in EXE and DLL; TBitmapInfoHeader; Writing bitmap files; Writing icon files

Surviving client/server: Database design primer
Authors	Steve Troxell		Type: Article
Issue	22 : June 1997	View article	No source code
Summary	Everything you always wanted to know about database design principles but were afraid to ask, explained clearly and simply by Steve Troxell
Keywords	Actionable information; Atomic values; Client/server design; Data normalisation; Data normalization; Database design; Declarative constraints; First normal form; No repeating groups; Null values in tables; Open/closed architecture; Relational database design; SQL; SQL DEFAULT; SQL NOT NULL; SQL domains; SQL user defined data types; Second normal form; Surviving client/server; Third normal form; Triggers; User security

One last compile: Psst! Wanna know a secret?
Authors			Type: Article
Issue	22 : June 1997	View article	No source code
Summary	Psst! Wanna know a secret?
Keywords	One last compile

Review: TCompress
Authors	Dave Jewell		Type: Review
Issue	22 : June 1997	View article	No source code
Summary	Dave Jewell kicks the tyres on this data compression component from SPIS
Keywords	Data compression; Reviews; SPIS New Zealand; TCompress

Review: TMultLang 1.2
Authors	Peter Hyde , Richard Smith		Type: Review
Issue	22 : June 1997	View article	No source code
Summary	Peter Hyde and Richard Smith have both grappled with multi-lingual apps and report back on a component from Lingscape which aims to make the whole thing a breeze...
Keywords	Lingscape; Multilingual applications; Multiple languages; Reviews; TMultLang

SDI menu problems
Authors	Brian Long		Type: Clinic
Issue	22 : June 1997	View article	View source code
Summary	SDI menu problems
Keywords	SDI applications; SDI menu problems

Drag and drop onto TMemo
Authors	Brian Long		Type: Clinic
Issue	22 : June 1997	View article	View source code
Summary	Drag and drop onto TMemo
Keywords	Drag and drop onto TMemo; Locating TMemo input caret; TMemo

Multiple TSplitter
Authors	Brian Long		Type: Clinic
Issue	22 : June 1997	View article	View source code
Summary	Multiple TSplitter
Keywords	Coordinating TSplitters; Delphi 3; Multiple TSplitter

Minimising Delphi applications
Authors	Brian Long		Type: Clinic
Issue	22 : June 1997	View article	View source code
Summary	Minimising Delphi applications
Keywords	Minimising Delphi apps; Minimizing

Query execution speed
Authors	Brian Long		Type: Clinic
Issue	22 : June 1997	View article	View source code
Summary	Query execution speed
Keywords	16-bit and 32-bit local SQL; Infopower QBE component; QBE queries; Query execution speed; SQL queries too slow

Unique log files
Authors	Tom Corcoran		Type: Tip
Issue	22 : June 1997	View article	View source code
Summary	Unique log files
Keywords	Unique log files; Using TStream for a log file

Validating TBitmap
Authors	Tom Corcoran		Type: Tip
Issue	22 : June 1997	View article	View source code
Summary	Validating TBitmap
Keywords	Validate bitmap file; Validating TBitmap

Closing DOS program window
Authors	Bruno Sonnino		Type: Tip
Issue	22 : June 1997	View article	View source code
Summary	Closing DOS program window
Keywords	Closing DOS program window; WinExec; command.com /c; sw_ShowNormal

Design time context sensitive help
Authors	Peter Hyde		Type: Tip
Issue	22 : June 1997	View article	View source code
Summary	Design time context sensitive help
Keywords	Context sensitive help; Delphi 3; Design time help

TabbedNotebook and TabSet components
Authors	Stephen Posey		Type: Tip
Issue	22 : June 1997	View article	View source code
Summary	TabbedNotebook and TabSet components
Keywords	Accessing notebook pages; Enumerated types; TTTabbedNotebook; TTabSet

QuickReports band layout
Authors	Brandon Smith		Type: Tip
Issue	22 : June 1997	View article	View source code
Summary	QuickReports band layout
Keywords	QuickReports band layout

QuickReports multiple detail fields
Authors	Brandon Smith		Type: Tip
Issue	22 : June 1997	View article	View source code
Summary	QuickReports multiple detail fields
Keywords	Multiple detail fields; QuickReports

QuickReports sizing and placement
Authors	Brandon Smith		Type: Tip
Issue	22 : June 1997	View article	View source code
Summary	QuickReports sizing and placement
Keywords	QuickReports; Sizing and placing fields

Converting Pascal to HTML
Authors	Marco Cant∙		Type: Article
Issue	23 : July 1997	View article	View source code
Summary	Marco describes Delphi's undocumented TParser code parser class and how he used it to create some really neat tools to display all your project source in a web browser
Keywords	Code parsing; Convert Pascal to HTML; Convert project to HTML; HTML; Internet; Lexical analysis; Parsing; Parsing source code; TParser; ToolServices; Wizards & experts

Under Construction: Delphi 3 packages
Authors	Bob Swart (aka Dr.Bob) , Chad Z Hower		Type: Article
Issue	23 : July 1997	View article	View source code
Summary	Bob Swart is joined by Chad Hower this month, together they give us the complete run-down on Delphi 3's new packages: using them for both run-time and design-time, writing and deploying them, with the benefits and pitfalls revealed, plus package collections and code signing.
Keywords	$IMPLICITBUILD; $IMPORTEDDATA; $RUNONLY; CAB file compression; Code signed packages; Code signing; Compiler directives; Creating packages; DCP files; DLLs; DPK files; DPL files; Delphi 3; Deploying packages; Design time packages; Distributing packages; Install package collection; List of packages in Delphi; Package collection editor; Package collections; Package versioning; Packages; Runtime packages; Under Construction; requires

Startup and shutdown points
Authors	Brian Long		Type: Article
Issue	23 : July 1997	View article	View source code
Summary	Delphi applications, units and DLLs have a variety of exit and entry points, Brian Long explains them all so you know exactly where to place your initialisation and finalisation code
Keywords	$DenyPackageUnit; AddExitProc; AddTerminateProc; Application.Terminate; DLL LibMain; DLL WEP; DLL entry point; DLL exit point; DLLEntryPoint; DLLMain; DLLProc; Exit procedures; ExitProc; Form drawing completed; InitProc; Initialisation procedures; Initialization; OnCloseQuery; Package exit procedure; Packages; Program entry point; Program exit point; Shutdown; Startup; TApplication.Initialize; Unit entry point; Unit exit point; Unit initialisation; finalization; wm_Paint; wm_QueryEndSession

One last compile
Authors			Type: Article
Issue	23 : July 1997	View article	No source code
Summary	The RAD road to Hell
Keywords	One last compile...

Surviving client/server: credit payments, part 1
Authors	Steve Troxell		Type: Article
Issue	23 : July 1997	View article	View source code
Summary	Steve Troxell begins examination of a client/server system case study, with insights into application and database design decisions
Keywords	Auto-increment fields; Case study; Client/server; Client/server design; Credit payments; Database design; InterBase; InterBase generator; SQL; Surviving client/server

Creating component suites: an event list
Authors	Paul Warren		Type: Article
Issue	23 : July 1997	View article	View source code
Summary	Paul Warren gets frustrated with badly written component suites, this monthhe begins an occasional series of key tips with an event list object for easy component interaction
Keywords	Component building; Component suites; Creating components; Event list component; Events; Linking components; Sharing events

Beating the system: Adding to your Delphi toolkit
Authors	Dave Jewell		Type: Article
Issue	23 : July 1997	View article	View source code
Summary	Dave Jewell takes a rest from bleeding edge technology and presents two nifty time-savers: a delimited string class and a minimal-code history list unit
Keywords	32-bit disk access; Default properties; Delimited string class; Delimited strings; Disk serial numbers; History list; History list unit; INI files; MRU list; Multiple constructors; Parsing; Parsing delimited strings; TStrings.CommaText; Text parsing; Windows Registry; Windows for Workgroups

Windows 95 system fonts
Authors	Steven J Colagiovanni		Type: Article
Issue	23 : July 1997	View article	View source code
Summary	Steven Colagiovanni demonstrates how to change the system fonts in your Win95 applications
Keywords	Changing system fonts; Font styles; GetSysColor; GetSysFont; LOGFONT structure; SPI_GETNONCLIENTMETRICS; System font colors; System fonts; SystemParametersInfo; TLogFont; Window caption width; Windows 95

Express yourself
Authors	Chris McNeil		Type: Article
Issue	23 : July 1997	View article	View source code
Summary	If you ever need to handle algebraic expressions (that's formulae to you and me!) Chris McNeil's TExpression component will get the job done easily and efficiently
Keywords	Algebra; Calculations; Creating components; Equations; Expression handling; GetComponentProperties; Maths; Properties; Property editors; Sub-properties

Message dialog buttons
Authors	Brian Long		Type: Clinic
Issue	23 : July 1997	View article	View source code
Summary	Message dialog buttons
Keywords	Custom message dialogs; Message dialog buttons; MessageDlg; ShowMessage

Critical Sections
Authors	Brian Long		Type: Clinic
Issue	23 : July 1997	View article	View source code
Summary	Critical Sections
Keywords	CRITICAL_SECTION; Critical Sections; EnterCriticalSection; TRTLCriticalSection; Win32 API

Stay on top TDBLookupComboBox in Delphi 1
Authors	Brian Long		Type: Clinic
Issue	23 : July 1997	View article	View source code
Summary	Stay on top TDBLookupComboBox in Delphi 1
Keywords	Bring component to top; Bring window to top; Stay on top; TDBLookupComboBox; TPopUpGrid

Using Locate with multiple fields
Authors	Brian Long		Type: Clinic
Issue	23 : July 1997	View article	View source code
Summary	Using Locate with multiple fields
Keywords	Database search; Locate with multiple fields; TTable

Acessing Win32 help file contents page
Authors	Brian Long		Type: Clinic
Issue	23 : July 1997	View article	View source code
Summary	Acessing Win32 help file contents page
Keywords	Help file contents page

Application launcher: finding running applications
Authors	Brian Long		Type: Clinic
Issue	23 : July 1997	View article	View source code
Summary	Application launcher: finding running applications
Keywords	Application launcher; FindWindow; Finding running applications; Microsoft office manager; Switching to running app

ShowWindow problem
Authors	Brian Long		Type: Clinic
Issue	23 : July 1997	View article	View source code
Summary	ShowWindow problem
Keywords	BringWindowToTop; FindWindow; Restore minimised program; ShowWindow

Update: executing methods by name
Authors	Brian Long		Type: Clinic
Issue	23 : July 1997	View article	View source code
Summary	Update: executing methods by name (from Issue 21: poor man's polymorphism)
Keywords	Execute methods by name

QuickReports images and dots
Authors	Brandon Smith		Type: Tip
Issue	23 : July 1997	View article	View source code
Summary	QuickReports images and dots
Keywords	QuickReports images and dots

QuickReports generalised report control
Authors	Brandon Smith		Type: Tip
Issue	23 : July 1997	View article	View source code
Summary	QuickReports generalised report control
Keywords	QuickReports

Delphi 3 hints bug
Authors	Hallvard Vassbotn		Type: Tip
Issue	23 : July 1997	View article	View source code
Summary	Delphi 3 hints bug
Keywords	Delphi 3 hints bug

Delphi 2 and 3 hints and warning bug
Authors	Hallvard Vassbotn		Type: Tip
Issue	23 : July 1997	View article	View source code
Summary	Delphi 2 and 3 hints and warning bug
Keywords	Compiler hints and warnings; Delphi 2 bug; Delphi 3 bug

Memo line and column
Authors	Bruno Sonnino		Type: Tip
Issue	23 : July 1997	View article	View source code
Summary	Memo line and column
Keywords	TMemo line and column

Under Construction: Delphi 3 Web Modules, Part 1
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	24 : August 1997	View article	View source code
Summary	Bob Swart begins a 2-part investigation into the new web modules included with Delphi 3's Client/Server Edition
Keywords	Building internet apps; CGI and WinCGI; Delphi 3; Generating HTML; ISAPI; Internet; IntraBob CGI debugger; NSAPI; TDataSetTableProducer; TPageProducer; TWebApplication; TWebDispatcher; TWebRequest; TWebResponse; Under Construction; Web modules; Web server applications

Things You Can Do With Standard Controls: TMenuItem
Authors	Brian Long		Type: Article
Issue	24 : August 1997	View article	View source code
Summary	Brian Long unravels more secrets of owner draw controls, demonstrating how to spice up your menus with glyphs
Keywords	Bitmap transparency; Bitmaps on menus; Custom menu items; Glyphs on menus; ModifyMenu; Owner draw menu items; TMenuItem

Surviving Client/Server: Credit Payments, Part 2
Authors	Steve Troxell		Type: Article
Issue	24 : August 1997	View article	View source code
Summary	Following on from last month's case study, Steve Troxell wraps up the project with more helpful design and implementation hints
Keywords	Client/server; Credit payments case study; Grid data changes; Master-detail-detail; OnSetEditText; Surviving Client/Server

Creating NT Services
Authors	John Chaytor		Type: Article
Issue	24 : August 1997	View article	View source code
Summary	Services are a powerful feature of Windows NT, but how can you write your own? John Chaytor has the answers, with example programs and Delphi classes to make it simpler
Keywords	Console applications; Creating NT services; Installing NT services; Registering NT services; Service Control Manager; Windows NT

Beating The System: Zip Files, Peeking Under The Hood
Authors	Dave Jewell		Type: Article
Issue	24 : August 1997	View article	View source code
Summary	The ubiquitous Zip file is everywhere nowadays and Dave Jewell shows how to delve inside and find what's there
Keywords	Beating the System; Data compression; QuickSort; Sorted TList; Sorting; ZIP file contents; ZIP file format

Implementing Class-Traps For Delphi And C++Builder
Authors	Cyril Jandia		Type: Article
Issue	24 : August 1997	View article	View source code
Summary	Cyril Jandia wants to be in at the birth and death of his objects so he came up with a simple technique, encapsulated in the TClassTrap class
Keywords	Assembly view Delphi 2; Class traps; Free; FreeInstance; Hooking functions; Hooking object creation; Hooking object destruction; Memory protection; NewInstance; Object construction; Object destruction; PAGE_EXECUTE_READ; PAGE_READWRITE; System unit; TClass; TVmt; VMT; Virtual method table; _ClassCreate; _ClassDestroy

One last compile
Authors			Type: Article
Issue	24 : August 1997	View article	No source code
Summary	I love my company, and my company loves me
Keywords	One last compile

Nashville BDC: A Mike's Eye View
Authors	Mike Orriss		Type: Article
Issue	24 : August 1997	View article	No source code
Summary	Mike Orriss reports back on his experiences at Borland's annual conference, held this year in Nashville, Tennessee
Keywords	BDC 1997; Borland Conference 1997; Nashville conference 1997

More News From Nashville
Authors	Chris Frizelle		Type: Article
Issue	24 : August 1997	View article	No source code
Summary	Borland used their conference to make some key announcements: here's a summary
Keywords	BDC 1997; Borland conference 1997; Nashville conference 1997

Review: ISGMAPI
Authors	Peter Hyde		Type: Review
Issue	24 : August 1997	View article	No source code
Summary	Your apps could have built in email and fax capabilities at the drop of a hat with this component from Infinity Software and a little help from MS Exchange, reviewed by Peter Hyde
Keywords	Communications components; Email; Fax; ISGMAPI 2.0; Infinity Software Group; MAPI; MS Exchange; Reviews

Making A 256 Colour Bitmap
Authors	Brian Long		Type: Clinic
Issue	24 : August 1997	View article	View source code
Summary	Making A 256 Colour Bitmap
Keywords	Colour bitmaps; Making a 256 colour bitmap; Palettes; TBitmap; TLogPalette

Delphi 2/3 Typed TObject Bug
Authors	Hallvard Vassbotn		Type: Tip
Issue	24 : August 1997	View article	View source code
Summary	Delphi 2/3 Typed TObject Bug
Keywords	Typed TObject bug Delphi 2/3

Background Palette Information
Authors	Brian Long		Type: Clinic
Issue	24 : August 1997	View article	View source code
Summary	Background Palette Information
Keywords	Colour bitmaps; Palettes

MessageDlg Surprises
Authors	Brian Long		Type: Clinic
Issue	24 : August 1997	View article	View source code
Summary	MessageDlg Surprises
Keywords	MessageDlg buttons

Localised Database Headaches
Authors	Brian Long		Type: Clinic
Issue	24 : August 1997	View article	View source code
Summary	Localised Database Headaches
Keywords	BCD fields; BDE; ENABLE BCD in BDE; Personal Oracle 7.3

Iconic Applications
Authors	Brian Long		Type: Clinic
Issue	24 : August 1997	View article	View source code
Summary	Iconic Applications
Keywords	Iconic applications; Non client area; Start app as icon; Start app minimised; TApplication; WindowState; wm_NCCreate; wm_QueryOpen; wsMinimized

Modifying Form Files
Authors	Brandon Smith		Type: Tip
Issue	24 : August 1997	View article	View source code
Summary	Modifying Form Files
Keywords	DFM files; Modifying form files

BDE Version Incompatibilities
Authors	Brandon Smith		Type: Tip
Issue	24 : August 1997	View article	View source code
Summary	BDE Version Incompatibilities
Keywords	BDE Version Incompatibilitie; BDE versions 3 and 4; Delphi 3; Multiple primary indexes; Table creation

More Delimiter Tools
Authors	Brandon Smith		Type: Tip
Issue	24 : August 1997	View article	View source code
Summary	More Delimiter Tools
Keywords	Comma delimited strings; Storing user settings; Storing window position; Storing window size

Just The Extension Please
Authors	Pete Frizzell		Type: Tip
Issue	24 : August 1997	View article	View source code
Summary	Just The Extension Please
Keywords	Just file extension

Surviving Client/Server: Custom Dataset Components, 1
Authors	Steve Troxell		Type: Article
Issue	25 : September 1997	View article	View source code
Summary	Delphi 3 now makes it much easier to interface to databases without using the BDE and this month Steve Troxell begins a series demonstrating how to do just this by creating your own dataset components
Keywords	BDE; BDE replacements; Bookmarks; Borland Database Engine; Client/server; Custom dataset components; Delphi 3; Interfacing to databases; Replacing the BDE; Surviving client/server; TBDEDataSet; TDataSet

Who Said It's Hip To Be Square?
Authors	Steven J Colagiovanni		Type: Article
Issue	25 : September 1997	View article	View source code
Summary	Tired of those boring old rectangular windows in your app? Well Steven Colagiovanni is here to show you how to spice things up with windows any shape you like!
Keywords	CombineRgn; CreateEllipticRgn; CreatePolygonRgn; Creating window regions; Custom window shapes; Custom window titlebar; Non-rectangular windows; SetWindowRegion; SetWindowRgn; Win32; Win32 drawing functions; Windows with holes in

Web Commerce With Delphi
Authors	Peter Hyde		Type: Article
Issue	25 : September 1997	View article	View source code
Summary	As the web gets more and more popular, so companies are more interested in using it to sell their wares but how can you build the secure web apps needed? Peter Hyde discusses the issues and pitfalls and demonstrates a simple online sales application created using the WebHub application framework
Keywords	CGI applications; Credit card validation; ECommerce; HTML; Internet; Online sales; SSL; Secure server; Secure web transactions; Web applications; Web browser security; Web commerce programs; WebHub; World wide web

One Last Compile...
Authors			Type: Article
Issue	25 : September 1997	View article	No source code
Summary	Mr Angry Writes
Keywords	One Last Compile...

Beating The System: Now Where Did I Put That File?
Authors	Dave Jewell		Type: Article
Issue	25 : September 1997	View article	View source code
Summary	Dave Jewell creates a general purpose file finding utility class, which can even look inside ZIP files, ready to plug into your own applications
Keywords	Beating the system; Deleting a file tree; Detecting available drives; Detecting drive type; File finder utility; FindFirst; FindNext; Long file names; Regular expression handler; Searching for files; Searching inside zip files; Wildcard file matching

Under Construction: Delphi 3 Web Modules, Part 2
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	25 : September 1997	View article	View source code
Summary	Continuing on from last month, Bob Swart shows how to write dynamic queries, save state information and even eat some cookies along the way...
Keywords	CGI applications; Cookies; Delphi 3; Dynamic queries in web apps; HTML forms; Hidden HTML form fields; Internet; NSAPI and ISAPI; Saving state; TPageProducer; TQueryTableProducer; TWebDispatcher; Under Construction; Web applications; Web modules; World wide web

Speeding Up Client/Server
Authors	David Selwood		Type: Article
Issue	25 : September 1997	View article	View source code
Summary	Mission-critical client/server apps need to run fast and David Selwood has lots of tips to help you ensure your programs will make the grade, including BDE setup, transaction control, SQL tuning and making the most of your chosen database server
Keywords	BDE; BDE configuration; Cached updates; Client/server; Data modules; ENABLE SCHEMA CACHE; Index design; Locate method; Multi-threading; Optimisation; Performance enhancement; SQL passthrough; SQL searching; SQLPASSTHRO MODE; SQLQRYMODE; Server tuning; Stored queries; Synchronize; Transaction control

GUID Generation
Authors	Brian Long		Type: Clinic
Issue	25 : September 1997	View article	View source code
Summary	GUID Generation
Keywords	Creating a GUID; GUID Generation; Globally unique identifier

ReportSmith and the TReport mystery
Authors	Brian Long		Type: Clinic
Issue	25 : September 1997	View article	View source code
Summary	ReportSmith and the TReport mystery
Keywords	ReportSmith; TReport and Delphi 3

Static class data
Authors	Brian Long		Type: Clinic
Issue	25 : September 1997	View article	View source code
Summary	Static class data
Keywords	C++ static keyword; Class methods; ClassName; Static class data

WideString
Authors	Brian Long		Type: Clinic
Issue	25 : September 1997	View article	View source code
Summary	WideString
Keywords	Unicode; WideString; WideString and Caption; WideString and Text

Win32s
Authors	Brian Long		Type: Clinic
Issue	25 : September 1997	View article	View source code
Summary	Win32s not supported in Delphi
Keywords	Win32s not supported Delphi

Command line compiler
Authors	Brian Long		Type: Clinic
Issue	25 : September 1997	View article	View source code
Summary	Command line compiler
Keywords	Command line compiler

Accessing components by name
Authors	Brian Long		Type: Clinic
Issue	25 : September 1997	View article	View source code
Summary	Accessing components by name
Keywords	Accessing components by name; FindComponent

Pixel colours changing
Authors	Brian Long		Type: Clinic
Issue	25 : September 1997	View article	View source code
Summary	Pixel colours changing
Keywords	Bitmap transparency; Pixel colours changing; TBitmap; TransparentColor

Copying string lists to the clipboard
Authors	Warren Kovach		Type: Tip
Issue	25 : September 1997	View article	View source code
Summary	Copying string lists to the clipboard
Keywords	Clipboard; Copying string lists to the; TStringList

Exposing field name
Authors	Tom Corcoran		Type: Tip
Issue	25 : September 1997	View article	View source code
Summary	Exposing field name
Keywords	Exposing field name; Getting field name

Large string lists
Authors	Reinhard Greeven		Type: Tip
Issue	25 : September 1997	View article	View source code
Summary	Large string lists
Keywords	Creating TStringList; Increasing TStringList size; Large string lists; Setting TStringList size; TStringList

Upgrading data between program versions
Authors	Stefan Boether		Type: Tip
Issue	25 : September 1997	View article	View source code
Summary	Upgrading data between program versions
Keywords	Program and data versions; Upgrading data utility unit

Trapping Keystrokes
Authors	Warren Kovach		Type: Article
Issue	26 : October 1997	View article	View source code
Summary	Warren Kovach demonstrates how to trap system-wide keystrokes by hooking into the Windows API, with a nifty Tray icon application to make entering accented and extended characters so easy as his example
Keywords	Accented characters; Broadcasting messages; CallNextHookEx; Compose key; Computer based training hook; Delphi shared memory manager; Examining messages; Extended characters; Foreign language characters; HWND_BROADCAST; Hooking Windows events; Hooking mouse events; KeyPreview; Keystroke handling; Message record/playback; Multiple instances of DLLs; OnKey... events; RegisterWindowMessage; SetWindowsHookEx; ShareMem unit; Trapping keystrokes; Tray icon applications; Types of Windows hook; UnhookWindowsEx; User defined messages; Virtual key codes; WH_JOURNALPLAYBACK; WH_JOURNALRECORD; WH_KEYBOARD hook; WM_TranslateKeys; Windows API; Windows hooks; Windows memory mapped files; Windows messages

Surviving Client/Server: Custom Dataset Components, 2
Authors	Steve Troxell		Type: Article
Issue	26 : October 1997	View article	View source code
Summary	Following on from last month's introduction, Steve Troxell concludes his discussion of database access without the BDE, covering null, date/time, calculated and lookup fields
Keywords	Calculated fields; Client/server; Custom TDataSet; Custom dataset components; Data-aware components; Database access; Defining fields; Non-BDE database access; Null values; Simple data dictionary; Surviving Client/Server; TDataSet; TField component; TFieldDef

Under Construction: Homepage Hit Counter
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	26 : October 1997	View article	View source code
Summary	Who's been coming to call? Bob Swart shows how to construct various types of hit counter for your website so you can discover exactly how popular you are!
Keywords	CGI applications; GIF file format; HTML; IP address of surfer; Internet applications; JPEG files; MIME headers; TJPEGImage; Under Construction; Website hit counter; Website log files; World wide web

Things You Can Do With Standard Controls: TPageControl
Authors	Brian Long		Type: Article
Issue	26 : October 1997	View article	View source code
Summary	Brian Long delves further into the mechanics of owner-draw controls, this month showing how to jazz up your notebooks by placing the tabs anywhere you want, replace them with buttons, or even use images along with the text descriptions of each tab
Keywords	32bit common controls; Custom notebook controls; Custom page controls; Owner drawn controls; Page control with bitmaps; TPageControl; TTabControl

Extending Web Solution Builder
Authors	Chad Z Hower		Type: Article
Issue	26 : October 1997	View article	View source code
Summary	Web Solution Builder (previously known as Portcullis/IAG) is a neat way to create web applications in Delphi, but you can also extend it, as its lead developer Chad Hower shows us, with custom HTML writers, placeholders to add non-Delphi HTML features and even customise Delphi existing components
Keywords	Drawbridge API; Internet applications; Portcullis; Shoreline Software; Web applications; Web solution builder; World wide web

Beating The System: Runtime Library Determination Utility
Authors	Dave Jewell		Type: Article
Issue	26 : October 1997	View article	View source code
Summary	Imagine a customer calling up to complain you forgot to include a vital DLL in the distribution package! Dave Jewell can help you avoid such embarrassment with his utility to find just what DLLs and Delphi packages your new masterpiece needs
Keywords	Beating the System; Checking DLL usage; DLL import data; EXE file format; RVA; Relative virtual address; TDump; Which DLLs are required?; Which packages are required?

One Last Compile...
Authors			Type: Article
Issue	26 : October 1997	View article	No source code
Summary	Interface issues: would you like to call an ambulance? ...and what's that bright green alien trying to say?
Keywords	One last compile...

DirectX 3D In Delphi
Authors	Andrew Kern , Noel Rice		Type: Article
Issue	26 : October 1997	View article	View source code
Summary	Andrew Kern and Noel Rice demonstrate how to exploit Microsoft's DirectX 3D graphics library in your own Delphi applications, with a bare-bones example to get you started
Keywords	Direct3D graphics; DirectX 3D graphics; Retained mode

Data Aware Control Request
Authors	Brian Long		Type: Clinic
Issue	26 : October 1997	View article	View source code
Summary	Data Aware Control Request
Keywords	Data aware components; Data aware controls; Data aware date picker; Date/time picker; TDateTimePicker; TFieldDataLink

Clipboard
Authors	Brian Long		Type: Clinic
Issue	26 : October 1997	View article	View source code
Summary	Clipboard
Keywords	Clipboard formats; Components on clipboard; Custom clipboard format; Multiple clipboard formats; TClipBoard

IDAPI32.CFG
Authors	Mike Orriss		Type: Tip
Issue	26 : October 1997	View article	View source code
Summary	IDAPI32.CFG
Keywords	BDE; Borland Database Engine; Disappearing aliases; IDAPI32.CFG

Changing The Month
Authors	Mike Orriss		Type: Tip
Issue	26 : October 1997	View article	View source code
Summary	Changing The Month
Keywords	Changing month; Date arithmetic; Number of days in month; TDateTime

Plugging In A Class
Authors	Jonas W Nordlof		Type: Tip
Issue	26 : October 1997	View article	View source code
Summary	Plugging In A Class
Keywords	Making VCL changes; Modifying compiled component; VCL changes without source

Notebook Menu Merging
Authors	Paul Warren		Type: Tip
Issue	26 : October 1997	View article	View source code
Summary	Notebook Menu Merging
Keywords	Menus and notebooks; Notebook menu merging; TMainMenu

Version Information
Authors	Octavio "Dave" Hernandez		Type: Tip
Issue	26 : October 1997	View article	View source code
Summary	Version Information
Keywords	RT_VERSION resource; Reading version information; TVSVersionFileInfo; VerQueryValue; Version information; VersionInfo resource

Starting Projects Via DPR
Authors	Mark Erbaugh		Type: Tip
Issue	26 : October 1997	View article	View source code
Summary	Starting Projects Via DPR
Keywords	Starting projects via DPR

Code Completion
Authors	Stephane Groberty		Type: Tip
Issue	26 : October 1997	View article	View source code
Summary	Code Completion
Keywords	Code completion; Form components

Navigation With Cursor Keys
Authors	Octavio "Dave" Hernandez		Type: Tip
Issue	26 : October 1997	View article	View source code
Summary	Navigation With Cursor Keys
Keywords	Form KeyPreview property; Keybd_Event; Navigation with cursor keys; Synthesising keystrokes

Update: More Delimiter Tools, Issue 24
Authors	Brandon Smith		Type: Tip
Issue	26 : October 1997	View article	View source code
Summary	Update: More Delimiter Tools, Issue 24
Keywords	Delimited text; Parsing words; Update: more delimiter tools

Update: Just The Extension Please
Authors	Thale Hadderingh		Type: Tip
Issue	26 : October 1997	View article	View source code
Summary	Update: Just The Extension Please
Keywords	ExtractFileName; Just file extension; Modify file extension

Delusions Of Grandeur
Authors	Julian Bucknall		Type: Article
Issue	27 : November 1997	View article	View source code
Summary	Julian Bucknall knows that it's a big wide multilingual world out there and has come up with some clever techniques to ensure that text strings which include all those funny accented, extended and ligature characters always sort correctly
Keywords	ANSII; Accented characters; AnsiCompareStr; Character encoding; Character sets; Collation order; CompareStr; CompareString; Comparing strings; DOS Code page; Extended characters; High-ascii characters; Indexing; Ligatures; OEM character set; Sorting; Windows character set; country.sys; display.sys

Surviving Client/Server: Data Mining With TDecisionCube
Authors	Steve Troxell		Type: Article
Issue	27 : November 1997	View article	No source code
Summary	The Client/Server Edition of Delphi 3 includes a new suite of components which make presenting complex data a simple task; Steve Troxell shows how to use them to best effect so that your users can go on their very own mining expeditions...
Keywords	Client/server; Crosstabulation; Data analysis; Data mining; Decision cubes; Decision support; Delphi 3; SQL; Surviving Client/Server; TDecisionCube; TDecisionGraph; TDecisionGrid; TDecisionPivot; TDecisionSource

Under Construction: TBrokenLink Component
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	27 : November 1997	View article	View source code
Summary	Now you know who's visiting your website (see last month's column), it's time to find and fix up all those broken links! Bob Swart creates a component to find both local and internet-wide broken links, plus there's a copy of his InterBob link checker on the disk too!
Keywords	Broken website links; Callbacks; File finding; FindFirst; HTML; HTML links; HTTP protocol; Internet; InternetCloseHandle; InternetConnect; InternetOpen; Local and remote link checks; Parsing HTML files; Under Construction; WININET.DLL; Web apps; Windows internet functions; World wide web

One Last Compile...
Authors			Type: Article
Issue	27 : November 1997	View article	No source code
Summary	How often do you do it?
Keywords	One last compile

Delphi 3 Add-In Packages: Digging The Dirt On Archaeopteryx
Authors	Brian Long		Type: Article
Issue	27 : November 1997	View article	View source code
Summary	Brian Long's curiosity got the better of him when he checked out a couple of the new Delphi 3 IDE add-ins: he figured out how the magic was done and created his very own add-in, called Archaeopteryx; even better, now he's sharing the secrets he discovered with us all
Keywords	Application object; Archaeopteryx; Chained event handlers; Customising Delphi 3; Delphi 3 IDE enhancement; Delphi 3 add-ins; Event chaining; Fake onclick events; FindComponent; Flat buttons; Merlin; Multiline component palette; NT memory leak; Packages; Raptor; Shortcut; T-Rex; TextToShortcut bug; Window styles; Windows NT

Beating The System: EXE Sniffing, The Story Continues...
Authors	Dave Jewell		Type: Article
Issue	27 : November 1997	View article	View source code
Summary	No, Dave Jewell hasn't found some crazy new way to get high, but this month he's delving inside your Delphi executables to determine just what units and packages are compiled into them
Keywords	$WEAKPACKAGEUNIT; Beating the system; Delphi 3; EXE file format; Finding units in EXE files; GetPackageInfo; LoadLibrary; Merlin; PACKAGEINFO resource; Streams; TResourceStream; UpdateResource; Which packages used; Which units used

Who Am I?
Authors	Xavier Pacheco		Type: Article
Issue	27 : November 1997	View article	View source code
Summary	Xavier Pacheco shows how to use version information in your Delphi 3 projects: adding it and retrieving it, with a handy TVerInfoRes class to make it all even simpler
Keywords	Delphi 3; Executable version; GetFileVersionInfo; GetFileVersionInfoSize; Getting version information; VerQueryValue; Version information

Controls Demystified
Authors	Glenn Lawrence		Type: Article
Issue	27 : November 1997	View article	View source code
Summary	Controls, components: which is which and why does it matter? Glenn Lawrence has the answers and some very helpful hints to improve your applications
Keywords	Class hierarchy; Control tree; Controls and components; Disabled controls; Enabled property; FindDragTarget; Finding controls; Graphic controls; Mouse over control; Non-visual components; Parent and child controls; Sibling controls; TComponent; TControl; TGraphicControl; TWinControl; Visual components; WindowFromPoint; Windowed controls; Wrapper controls

UNC
Authors	Brian Long		Type: Clinic
Issue	27 : November 1997	View article	View source code
Summary	UNC
Keywords	TDirectoryListBox; TFileListBox; UNC drive names

Unexpected Disk Space
Authors	Brian Long		Type: Clinic
Issue	27 : November 1997	View article	View source code
Summary	Unexpected Disk Space
Keywords	DiskFree and NT 4; Drives over 3Gb

Calling Into DLLs
Authors	Brian Long		Type: Clinic
Issue	27 : November 1997	View article	View source code
Summary	Calling Into DLLs
Keywords	Calling into DLLs; DLL calls

Context Help
Authors	Brian Long		Type: Clinic
Issue	27 : November 1997	View article	View source code
Summary	Context Help
Keywords	BorderIcons; Context Help; Context sensitive Help; Window border buttons

Table Names
Authors	Brian Long		Type: Clinic
Issue	27 : November 1997	View article	View source code
Summary	Table Names
Keywords	Getting Access table names; TSession

Forms Compiled Into Exes
Authors	Brian Long		Type: Clinic
Issue	27 : November 1997	View article	View source code
Summary	Forms Compiled Into Exes
Keywords	Extracting forms from EXEs; ObjectResourceToText; convert.exe

DLL Imports
Authors	Brian Long		Type: Clinic
Issue	27 : November 1997	View article	View source code
Summary	DLL Imports
Keywords	DLL import table garbled; QuickView

Win32 API error codes
Authors	Andy McFarlane		Type: Tip
Issue	27 : November 1997	View article	View source code
Summary	Win32 API error codes
Keywords	FormatMessage; GetLastError; Win32 API error codes

Two 'Gotchas'
Authors	Mat Newman		Type: Tip
Issue	27 : November 1997	View article	View source code
Summary	Two 'Gotchas'
Keywords	EnumChildWindows callback; SetParent

Update: Starting Projects Via DPR
Authors	Russ Garner		Type: Tip
Issue	27 : November 1997	View article	View source code
Summary	Update: Starting Projects Via DPR
Keywords	Loading projects in Explorer

Update: Navigation With Cursor Keys (Issue 26)
Authors	Lucas Franzen		Type: Tip
Issue	27 : November 1997	View article	View source code
Summary	Update: Navigation With Cursor Keys (Issue 26)
Keywords	Navigation with cursor keys

Const Parameters
Authors	Mike Orriss		Type: Tip
Issue	27 : November 1997	View article	View source code
Summary	Const Parameters
Keywords	Const parameters; Passing Interfaces

Colours Property Editor
Authors	Mike Scott		Type: Tip
Issue	27 : November 1997	View article	View source code
Summary	Colours Property Editor
Keywords	Color property editor; Colour property editor

FilteredComponent Property Editor
Authors	Mike Scott		Type: Tip
Issue	27 : November 1997	View article	View source code
Summary	FilteredComponent Property Editor
Keywords	Component property editor; Property editors

DbiDoRestructure Wrapper
Authors	Roberto De Marini		Type: Tip
Issue	27 : November 1997	View article	View source code
Summary	DbiDoRestructure Wrapper
Keywords	DbiDoRestructure wrapper; Rebuilding indexes; Restructuring tables

Subclassing
Authors	Brandon Smith		Type: Article
Issue	28 : December 1997	View article	View source code
Summary	Brandon Smith explains how Windows API subclassing can improve your applications and provides some useful hints and techniques
Keywords	Component parent and child; CreateParams; EN_CHANGE; Enhanced memo component; Event handling; GetProp; MakeObjectInstance; SetProp; Subclassing; TMemo; TWinControl; TurnOnSubclassing; WNDCLASS structure; WNDPROC; Window classes; Window procedure; WindowProc; Windows API; Windows message handling; Windows messages

Surviving Client/Server: Phonetic Matching
Authors	Steve Troxell		Type: Article
Issue	28 : December 1997	View article	View source code
Summary	Matching the right information data to the right database record can be tricky, but Steve Troxell has the solutions: Soundex and Metaphone phonetic matching, all ready to roll
Keywords	Client/server; Metaphone; Phonetic matching; SQL; Soundex; Surviving client/server; Text matching

TDataSet Update from Issues 25 and 26
Authors	Steve Troxell		Type: Article
Issue	28 : December 1997	View article	View source code
Summary	TDataSet Update from Issues 25 and 26
Keywords	Custom TDataSet; Surviving client/server

Surviving SQL: Phonetic matching
Authors	Steve Troxell		Type: Article
Issue	28 : December 1997	View article	View source code
Summary	Steve Troxell brings us the first of his occasional SQL hints and tips column, this month's edition is an SQL implementation of Soundex
Keywords	Client/server; SQL; SQL Server; Soundex; Stored procedures; Surviving SQL

Under Construction: Assertions
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	28 : December 1997	View article	View source code
Summary	Delphi 3 introduced assertions and Bob Swart explains how to use them to best effect in error handling, along with implementations for earlier Delphi versions too
Keywords	$ASSERTIONS ON; $C+ compiler directive; Assert in Delphi 1 and 2; Assert in Delphi 3; Assertions; Assertions and exceptions; Debug version; Error handling; Error location; Source code line; Under construction

Delphi Meets COM: Part 1
Authors	Dave Jewell		Type: Article
Issue	28 : December 1997	View article	No source code
Summary	COM (or Component Object Model) programming is becoming increasingly important in Windows and Dave Jewell starts this series by explaining the foundations of it all and just why it's something we all need to know about
Keywords	ActiveX; CLSID; COM programming; Component Object Model; Creating a GUID; DDE; Dynamic data exchange; GUIDs; Globally unique identifiers; IUnknown; Interface inheritance; Interfaces; Microsoft GUIDGEN; OCX; OLE; Object linking and embedding; QueryInterface; VBX controls

Get On The Web With Delphi 3
Authors	John O'Connell		Type: Article
Issue	28 : December 1997	View article	View source code
Summary	In a two-part series, John O'Connell aims to explain (nearly) everything you need to know about writing web applications but didn't know you needed to ask
Keywords	CGI; Console applications; Delphi 3; Delphi 3 web components; GET and POST request methods; HTML; HTML forms; HTTP; HTTP status codes; ISAPI and NSAPI; Internet; MIME; TCGIApplication; TWebActionItem; URL encoding; Web applications; Web server; Web server APIs; WebDispatcher; WebModule; WebRequest; WebResponse; WinCGI; World wide web

One Last Compile...
Authors			Type: Article
Issue	28 : December 1997	View article	No source code
Summary	Dear Santa
Keywords	One Last Compile...

Beating The System: Using OpenGL In Delphi Apps
Authors	Dave Jewell		Type: Article
Issue	28 : December 1997	View article	View source code
Summary	Dave Jewell shows how to produce high-quality photo-realistic 3D graphics using Microsoft's implementation of OpenGL, and compares OpenGL with DirectX
Keywords	3D graphics; Beating The System; DirectX 3D graphics; GLAUX OpenGL library; GLU32.DLL; OPENGL32.DLL; OpenGL graphics programming; Photo-realistic rendering

Update to Issue 27 Beating the System
Authors	Dave Jewell		Type: Article
Issue	28 : December 1997	View article	No source code
Summary	Update to Issue 27 Beating the System
Keywords	Beating the System; Finding units in EXE files; Issue 27 update; Units compiled in EXE

TPageControl.OnChanging
Authors	Brian Long		Type: Clinic
Issue	28 : December 1997	View article	View source code
Summary	TPageControl.OnChanging
Keywords	Next page; Obtain page to be changed to; TPageControl.OnChanging

Removing components in Delphi 3
Authors	Brian Long		Type: Clinic
Issue	28 : December 1997	View article	View source code
Summary	Removing components in Delphi 3
Keywords	Deleting components; Hiding components; Removing components Delphi 3

Version information build number
Authors	Brian Long		Type: Clinic
Issue	28 : December 1997	View article	View source code
Summary	Version information build number
Keywords	Build number; Version information

Custom message dialog caption
Authors	Brian Long		Type: Clinic
Issue	28 : December 1997	View article	View source code
Summary	Custom message dialog caption
Keywords	CreateMessageDlg; Message dialog caption; MessageDlg caption

SQL Server blob size
Authors	Brian Long		Type: Clinic
Issue	28 : December 1997	View article	View source code
Summary	SQL Server blob size
Keywords	BLOB SIZE in BDE; BLOB fields; BLOBs larger than 32Kb; SQL Server blob size

Changing paradox table language
Authors	Brian Long		Type: Clinic
Issue	28 : December 1997	View article	View source code
Summary	Changing paradox table language
Keywords	Change table language; Paradox table language; Table restructuring; dbiDoRestructure

Check if EXE is running
Authors	Brian Long		Type: Clinic
Issue	28 : December 1997	View article	View source code
Summary	Check if EXE is running
Keywords	Check if EXE is running; CreateProcess; Process handles; WaitForSingleObject

Opening projects
Authors	Brian Long		Type: Clinic
Issue	28 : December 1997	View article	View source code
Summary	Opening projects
Keywords	Delphi desktop file; Delphi project files; Opening projects

Undo in Edit controls
Authors	Brian Long		Type: Clinic
Issue	28 : December 1997	View article	View source code
Summary	Undo in Edit controls
Keywords	TEdit undo; Undo handler; Undo in Edit controls; Undo programmatic changes

Interfaced classes
Authors	Mike Scott		Type: Tip
Issue	28 : December 1997	View article	View source code
Summary	Interfaced classes
Keywords	COM and DCOM; Custom interface classes; Interfaced classes

Limiting a form's width and height
Authors	Xavier Pacheco		Type: Tip
Issue	28 : December 1997	View article	View source code
Summary	Limiting a form's width and height
Keywords	Form width and height; Limiting form width & height; WM_GETMINMAXINFO

String matching
Authors	Mike Orriss		Type: Tip
Issue	28 : December 1997	View article	View source code
Summary	String matching
Keywords	Masked string matching; MatchesMask; String matching; TMask class in Delphi 3

DBGrid current cell position
Authors	Mike Orriss		Type: Tip
Issue	28 : December 1997	View article	View source code
Summary	DBGrid current cell position
Keywords	Cell coordinates; DBGrid current cell position; DrawDataCell; TDBGrid

Horizontal scrolls for ListBox
Authors	Tom Corcoran		Type: Tip
Issue	28 : December 1997	View article	View source code
Summary	Horizontal scrolls for ListBox
Keywords	Horizontal scrollbars; Scrollbars on ListBox; TListBox

Find oldest and newest files
Authors	Tom Corcoran		Type: Tip
Issue	28 : December 1997	View article	View source code
Summary	Find oldest and newest files
Keywords	Find oldest and newest files; Unique filename

Painting on a GroupBox
Authors	Mike Orriss		Type: Tip
Issue	28 : December 1997	View article	View source code
Summary	Painting on a GroupBox
Keywords	CopyRect; GroupBox canvas; Painting on a GroupBox

Radio group and ActiveControl
Authors	Mike Orriss		Type: Tip
Issue	28 : December 1997	View article	View source code
Summary	Radio group and ActiveControl
Keywords	ActiveControl; HelpContext radio group; Make radio group active

Insert and overtype mode for DBEdit
Authors	Mike Orriss		Type: Tip
Issue	28 : December 1997	View article	View source code
Summary	Insert and overtype mode for DBEdit
Keywords	Custom DBEdit control; DBEdit; Insert and overtype toggle

Cursor key navigation
Authors	Gurbhajan Singh Bagh		Type: Tip
Issue	28 : December 1997	View article	View source code
Summary	Cursor key navigation
Keywords	Cursor key navigation; SelectNext

Fields editor at runtime
Authors	Mike Orriss		Type: Tip
Issue	28 : December 1997	View article	View source code
Summary	Fields editor at runtime
Keywords	Fields editor at runtime

Getting buttons to push themselves
Authors	Mike Orriss		Type: Tip
Issue	28 : December 1997	View article	View source code
Summary	Getting buttons to push themselves
Keywords	Buttons push themselves; TButton to press itself

Beating The System: Exploring Delphi's Closed-Tools API
Authors	Dave Jewell		Type: Article
Issue	29 : January 1998	View article	View source code
Summary	Delphi IDE integration for rocket scientists? Dave Jewell has been tinkering in Delphi's innards again and this month shows us how to get to the bits of the Delphi IDE that Borland didn't want to tell you about, spilling the beans on the LibIntf unit and what it can do for you. If you have some neat ideas for Delphi IDE wizards or experts, then this is article is for you!
Keywords	Beating the System; COMPLIB.DCL contents; Component palette; Component palette icons; Current time in Delphi IDE; DOS date/time format; Delphi IDE add-ins; Delphi IDE customisation; Delphi IDE dialogs; Delphi IDE internals; Delphi base registry key; Delphi main window handle; Delphi path & exe name; DelphiIDE variable; Experts; Form designer; Form designer options; GetAppHandle; GetBaseRegKey; GetBaseRegistryKey; GetCurTime; GetPathAndBaseExeName; LibHelp unit; LibIntf unit; LibMain unit; LockState; Locking controls in designer; Open Tools API; Proxies unit; Size location Delphi window; TIDelphiIDE; TILibAppBuilder; TILibrary; TInterface; TLHelp32 unit; ToolServices; VCL30 package has LibIntf

Here Comes The Flood
Authors	Julian Bucknall		Type: Article
Issue	29 : January 1998	View article	View source code
Summary	Julian Bucknall got fed up with TFileStream being slow with lots of small data chunks so he set to and wrote a replacement go-faster version with efficient buffering
Keywords	Buffered file stream; Code profiling; File buffers; File handling; Performance enhancement; Streaming; TFileStream; THandleStream; TStream

Under Construction: Website Indexing, Part 1
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	29 : January 1998	View article	View source code
Summary	to do exactly that in Delphi. Even if you aren't into website building, the techniques are really useful for non-web applications too! Would you like to include a search facility on your website? Bob Swart begins a 2-part series describing how
Keywords	Binary tree; CGI applications; CGI support unit; Internet; Keywords; Local search engine; Reading binary tree; Storing binary tree on disk; Text indexing; Text searching; Under Construction; Web applications; Website indexing; Website search engine; World wide web; Writing binary tree to file

Surviving Client/Server: Indexing Freeform Text
Authors	Steve Troxell		Type: Article
Issue	29 : January 1998	View article	View source code
Summary	Ok, so you have loads of information in your databases and some snazz client/server apps to work with it, but then some troublesome user comes along and wants a free text search capability... Steve Troxell comes to the rescue in this month's column, showing how to do what you wouldn't believe is possible in SQL!
Keywords	AND OR NOT NEAR searches; Client/server; Creating a text index; Indexing memo fields; Indexing text in SQL; Keywords; Phrase matching; SQL; Scanning memo fields; Searching for phrases; Searching memo fields; Surviving client/server

Get On The Web With Delphi 3
Authors	John O'Connell		Type: Article
Issue	29 : January 1998	View article	View source code
Summary	John O'Connell presents the concluding part of his discussion of "everything you need to know about writing web applications with Delphi 3 (but didn't know you needed to ask)"
Keywords	ActiveX security problems; BDE in ISAPI applications; Bugs in CGI Delphi classes; CGI; Client-side form validation; Configuring NSAPI; Configuring webservers; Cookies; Debugging web applications; Delphi 3; Generating HTML; HTTPAPP unit; Hidden form fields; ISAPI; Internet; Internet applications; Local webservers; NSAPI; Netscape FastTrack 2.0; O'Reilly Website Server 1.1; Saving state in web apps; Set-Cookie; TISAPIApplication; TPageProducer; TWebRequest; TWebResponse; URL encoding and decoding; URL redirection; Updating ISAPI DLLs; Validating HTML forms; Validation with Javascript; Validation with VBScript; Web applications; WebDispatcher; WebModule; Webserver software; Webserver status codes; World wide web

Delphi Meets COM: Part 2
Authors	Dave Jewell		Type: Article
Issue	29 : January 1998	View article	No source code
Summary	Dave Jewell has the second part of his Editor's guide (read "idiot's guide"!) to writing COM applications in Delphi, laying some more flesh on last month's introductory bones
Keywords	CLSID; COM aggregation; COM programming; Class factory; CoCreateInstance; Context menu handler; GUIDs; IContextMenu; IIDs; IMalloc; IShellExtInit; IUnknown interface; Internals of COM calls; QueryInterface; REFIIDs; TComObject; Windows Explorer

One Last Compile...
Authors			Type: Article
Issue	29 : January 1998	View article	No source code
Summary	Delphi and the art of hard disk maintenance
Keywords	One last compile...

MS SQL Server Connections
Authors	Brian Long		Type: Clinic
Issue	29 : January 1998	View article	View source code
Summary	MS SQL Server Connections
Keywords	Connecting to SQL Server; KeepConnected; SQL Server cursors

Nicely Formatted Numbers
Authors	Brian Long		Type: Clinic
Issue	29 : January 1998	View article	View source code
Summary	Nicely Formatted Numbers
Keywords	Converting float to string; Converting integer to float; FloatToStrF; Format (text); FormatFloat; Number formatting

Failed Typecast
Authors	Brian Long		Type: Clinic
Issue	29 : January 1998	View article	View source code
Summary	Failed Typecast
Keywords	Casting single to longint; Delphi 3; Typecasting

Destructor Query
Authors	Brian Long		Type: Clinic
Issue	29 : January 1998	View article	View source code
Summary	Destructor Query
Keywords	Destroy or Free; Destroying objects

SLIB Directory
Authors	Brian Long		Type: Clinic
Issue	29 : January 1998	View article	View source code
Summary	SLIB Directory
Keywords	SLIB directory; Stack frames

Form Creation
Authors	Brian Long		Type: Clinic
Issue	29 : January 1998	View article	View source code
Summary	Form Creation
Keywords	CreateNew; Creating forms at runtime; Form constructor not found; Form creation; Resource TForm not found

Microsoft Web Browser ActiveX
Authors	Brian Long		Type: Clinic
Issue	29 : January 1998	View article	View source code
Summary	Microsoft Web Browser ActiveX
Keywords	ActiveX wrappers; Installing ActiveX; MS Web Browser ActiveX; TWebBrowser

Writing A Cross Reference Tool
Authors	Marco Cant∙		Type: Article
Issue	30 : February 1998	View article	View source code
Summary	Marco Cant∙ describes a clever utility which cross-references the variables, functions, procedures and more from all your source code files, then presents the results as HTML files; he also shows how the same techniques can be used to publish databases on the web
Keywords	Converting database to HTML; Database cross-referencing; File handling; Generating HTML; Generating HTML for database; HTML; Optimisation; Parser; Parsing source code files; Performance enhancement; Publishing database as HTML; Scanning files; Searching for files; Sorting and searching; Source code cross reference; Source code indexing; Streams; TFileStream; Translate Pascal to HTML

Ballet Mechanique
Authors	Julian Bucknall		Type: Article
Issue	30 : February 1998	View article	View source code
Summary	How can you find items in a list really quickly? Julian Bucknall knows how to get your data dancing to the right tune and this month begins his explanation of hash tables
Keywords	Algorithms; Binary search; Collision resolution; ELF hash; Hash collisions; Hash functions; Hash tables; Hashing; Linear probing; Normal distribution; Optimisation; Performance enhancement; Poisson distribution; Search algorithms; Searching and indexing; TStringList limitations

Under Construction: Website Indexing, Part 2
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	30 : February 1998	View article	View source code
Summary	Want to add a search engine to your website? Bob Swart has all the code you need: building on last month's instalment, he adds support for AND, NOT and OR keywords in queries and plugs in some performance boosts too!
Keywords	Binary trees; CGI; HTML meta tags; Hash tables; Hashing; Internet; Internet applications; Local search engine; Optimisation; Performance enhancement; Searching with AND OR NOT; Text searching; Under Construction; Web applications; Website indexing; Website search engine; World wide web

Delphi Meets COM: Part 3
Authors	Dave Jewell		Type: Article
Issue	30 : February 1998	View article	View source code
Summary	This month Dave Jewell has some real COM projects for you to get to grips with, including working with Shell context menus and a nifty fix to stop multiple copies of Delphi being opened from Explorer
Keywords	.REG files; CLSIDFromProgID; COM programming; COMOBJ unit; Context menu; Context menu registration; CreateOLEObject; Creating GUIDs; Drag and drop; GUIDs and CLSIDs; MS Word Basic; Microsoft Word; OLE Automation; PROGID; ProgIDToClassID; Registry; Source viewer; TContextMenu; Viewing files in Explorer; WM_DROPFILES; Windows API; Windows Explorer; Word.Basic registry key

One Last Compile...
Authors			Type: Article
Issue	30 : February 1998	View article	No source code
Summary	Wake up and smell the coffee
Keywords	One last compile...

Fatal Startup Error
Authors	Brian Long		Type: Article
Issue	30 : February 1998	View article	View source code
Summary	Brian Long looks in detail at why deleting declarations of 'decorative' objects from your source files causes problems, with insights in to Delphi's handling of forms, RTTI and more
Keywords	Class not found error; Delphi form internals; Fatal startup error; Field class table; Field table; Form creation; Form files; Global class list; InsertComponent; Method table; RTTI; ReadComponentRes; RegisterClass; Registering a class; Removing code from forms; Run time type information; Smart linking; Streams; TObject.FieldAddress; TObject.MethodAddress; TObject.MethodName; TReader; Unwanted declarations; Virtual constructors

Beating The System: Exploring Delphi's Closed-Tools API, Part 2
Authors	Dave Jewell		Type: Article
Issue	30 : February 1998	View article	View source code
Summary	Dave Jewell continues his detailed examination of Delphi's hidden LibIntf unit, putting the Delphi IDE on auto-pilot with the TILibrary class
Keywords	Beating the System; Control locking; CurrentGroup; Delphi 3 IDE; Design time packages; Experts; Find selected component; GetActiveForm; GetComponentBitmap; GetFirstSelectionType; GetOleCtrlHelp; GetProperties; GetSelection; GetSelectionName; GetSelectionType; HideWindows; IDE add-ins; IsTopMostForm; LibIntf unit; LockState; Open Tools API; Packages; Registering experts; ShowWindows; TComponentList; TIComponentInterface; TIDelphiIDE; TIFormInterface; TILibrary; Un-registering experts

The Ultimate TDataLink?
Authors	Joanna Carter		Type: Article
Issue	30 : February 1998	View article	View source code
Summary	Joanna Carter checks out the best way for data-aware component writers to link data to controls
Keywords	Component building; Creating components; Data-aware controls; Is datasource valid?; TDataLink; TDataSource; TFieldDataLink; TGridDataLink

Loading Arbitrary Forms
Authors	Brian Long		Type: Clinic
Issue	30 : February 1998	View article	View source code
Summary	Loading Arbitrary Forms
Keywords	Form resources; LoadPackage; Loading arbitrary forms; Reading form files; UnloadPackage

Design-Time Packages
Authors	Brian Long		Type: Clinic
Issue	30 : February 1998	View article	View source code
Summary	Design-Time Packages
Keywords	Design-Time Packages; Packages

Alias Property Editor
Authors	Brian Long		Type: Clinic
Issue	30 : February 1998	View article	View source code
Summary	Alias Property Editor
Keywords	Alias Property Editor; GetDatabaseNames; Listing database aliases; Writing property editors

Index Combobox
Authors	Brian Long		Type: Clinic
Issue	30 : February 1998	View article	View source code
Summary	Index Combobox
Keywords	GetIndexNames; Index Combobox; IndexFieldNames; Listing availale indexes

IndexFieldNames Exception
Authors	Brian Long		Type: Clinic
Issue	30 : February 1998	View article	View source code
Summary	IndexFieldNames Exception
Keywords	Descending index; GetIndexForFields; IndexFieldNames; IndexFieldNames Exception; IndexName

Pictures In Databases
Authors	Brian Long		Type: Clinic
Issue	30 : February 1998	View article	View source code
Summary	Pictures In Databases
Keywords	LoadFromFile; Pictures In Databases; Storing bitmaps in tables

Errata
Authors	Brian Long		Type: Clinic
Issue	30 : February 1998	View article	View source code
Summary	Errata
Keywords	Clinic issue 27 error; Resource explorer

Mike's Corner
Authors	Mike Orriss		Type: Article
Issue	30 : February 1998	View article	View source code
Summary	The first instalment of Mike Orriss' new column. Indexed properties, clean screen updates and a difference engine.
Keywords	Clean screen updates; File differences; File patching; Indexed properties; LockWindowUpdate; Mike's Corner; Parameterised properties; Screen flicker; TLockWindow; TreeView controls; Updating TreeView

Surviving Client/Server: Three- Tier Applications With MIDAS
Authors	Steve Troxell , Scott Samet		Type: Article
Issue	31 : March 1998	View article	No source code
Summary	Steve Troxell and colleague Scott Samet explain what tiers are all about, why they are important, and show how to write multi-tier applications with TClientDataSet, TProvider, and the related new components from Delphi 3
Keywords	Automatic load balancing; Borland Database Engine, BDE; Briefcase applications; Business rules; COM, DCOM; Client/server; Data caching; Distributed COM; MIDAS; Middleware; Multi-tier architecture; OLE Automation; Object brokers; OnReconcileError; Remote Data Module; Remote Dataset; Server class instancing; Surviving client/server; TCP/IP; TClientDataset; TDataModule; TProvider; TRemoteServer; Three-tier applications; Two-tier applications; Type library editor

Web Commerce With Delphi: Live Transaction Processing
Authors	Peter Hyde		Type: Article
Issue	31 : March 1998	View article	View source code
Summary	Peter Hyde returns to Web Commerce, describing the options available for implementing live credit card transaction processing, complete with ready to run sample code
Keywords	Banking terms; Cybercash; E-Commerce; ICVerify; Internet applications; Live transaction processing; META REFRESH HTML tag; Online transactions; Transaction queuing; Validating credit cards; Web applications; Web commerce; World wide web

Hang Onto Yourself
Authors	Julian Bucknall		Type: Article
Issue	31 : March 1998	View article	View source code
Summary	Julian Bucknall concludes his 2-parter exploration of hash tables and how to use them in your Delphi applications to make finding text strings in long lists really quick, plus there's a natty hash-index record manager ready to plug right into your programs!
Keywords	Collision resolution; Dynamic hash tables; Extensible hashing; Hash indexed record manager; Hash table limitations; Hash tables; Hash tables on disk; Hashing; Linear hashing; Linear probing; Record buckets

Beating The System: Exploring Delphi's Closed-Tools API, 3
Authors	Dave Jewell		Type: Article
Issue	31 : March 1998	View article	View source code
Summary	Dave Jewell concludes his examination of Delphi's LibIntf unit, with a peek into the workings of the TIModule and TIForm classes
Keywords	Beating the System; Customising Delphi IDE; Delphi IDE API; Design time form image; Get component name; GetActiveForm; GetCompCount; GetCompName; GetDesigner; GetFormImage; LibIntf unit; Make image of form; Number of components on form; Open Tools API; Proxies; TFormDesigner; TICompInfo; TIForm class; TILibrary; TLibForm; TWindowDesigner

One Last Compile...
Authors			Type: Article
Issue	31 : March 1998	View article	No source code
Summary	Testing times
Keywords	One last compile...

Under Construction: A Simple Spelling Checker
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	31 : March 1998	View article	View source code
Summary	Bob Swart describes the implementation of a spelling checker using minimal resources: ideal for when the Full Monty would be over the top!
Keywords	Binary search; Binary tree; Dictionaries and word lists; Spell checking; Spelling checker; Spelling suggestions; Under Construction

Delphi Meets COM: Part 4
Authors	Dave Jewell		Type: Article
Issue	31 : March 1998	View article	View source code
Summary	This month Dave Jewell describes some more handy shell extensions: copy hook handlers, icon handlers and property sheet handlers, plus introduces Delphi's support for dispatch interfaces
Keywords	Adding property sheet pages; COM; Context menu handlers; Copy hook handlers; Copying folders; Deleting folders; Delphi meets COM; DispID; Dispatch interface; Dispinterface; Extract icon from file; ExtractIcon; GetIconLocation; IAmbientDispatch; IDispatch; IExtractIcon; IShellExtInit; IShellPropSheetExt; Icon handlers; IpersistFile; Modify file icon in Explorer; Moving folders; Printer status change; Property sheet handlers; Renaming folders; Shell extensions; Type library; Windows Explorer

Writing Microsoft SQL Server Extended Stored Procedures
Authors	Berend de Boer		Type: Article
Issue	31 : March 1998	View article	View source code
Summary	SQL Server has the powerful capability to make functions in DLLs available as stored procedures, and Berend de Boer has a nifty framework which makes developing such DLLs a piece of cake
Keywords	DLLs; Extended stored procedures; MS Transact SQL and Delphi; MS Transact SQL datatypes; Open Data Services; SQL Server; SQL limitations; Writing DLLs

Table Source Generator Expert
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	31 : March 1998	View article	View source code
Summary	Bob Swart describes development of a Delphi Expert which automatically creates source code to regenerate database tables and index files: ideal for plugging into your application so you don't have to ship empty table files!
Keywords	Borland Database Engine BDE; Convert table to HTML; CreateTable; Experts; Generating Paradox indexes; Generating Paradox tables; Paradox table fields; Table source generator; TableBob Wizard; Writing experts

Delphi 3 Display Glitch
Authors	Brian Long		Type: Clinic
Issue	31 : March 1998	View article	View source code
Summary	Delphi 3 Display Glitch
Keywords	Delphi 3 Display Glitch; Palette display problems; comctl32.dll

Troublesome RichEdits
Authors	Brian Long		Type: Clinic
Issue	31 : March 1998	View article	View source code
Summary	Troublesome RichEdits
Keywords	Clipboard; Copying TRichEdit contents; Copying using streams; Streams; TMemoryStream; TRichEdit

Rounding Inconsistency
Authors	Brian Long		Type: Clinic
Issue	31 : March 1998	View article	View source code
Summary	Rounding Inconsistency
Keywords	Bankers rounding; Round function; Rounding Inconsistency; Rounding floating points

Icons, Metafiles And Graphic Fields
Authors	Brian Long		Type: Clinic
Issue	31 : March 1998	View article	View source code
Summary	Icons, Metafiles And Graphic Fields
Keywords	Blob fields; EInvalidGraphic; Graphic fields; Icons; JPEG; LoadFromFile; Metafiles; Storing icon in database; Storing metafile in database; TBlobField

Thunking: Calling 16-Bit Code From 32-Bit
Authors	Brian Long		Type: Clinic
Issue	31 : March 1998	View article	View source code
Summary	Thunking: Calling 16-Bit Code From 32-Bit
Keywords	Calling 16-bit code from 32; QT_Thunk; Thunking; Windows 95 OSR2

Simulating Multiple Inheritance With Delphi Interfaces
Authors	Marco Cant∙		Type: Article
Issue	32 : April 1998	View article	View source code
Summary	Marco Cant∙ shows how to do what some might believe is the unthinkable using the power and flexibility of interfaces, introduced in Delphi 3
Keywords	Abstract classes; Abstract virtual methods; Array of interface variables; COM programming; Delphi 3; GUIDs; Interfaces; Multiple inheritance; Object oriented programming; Polymorphism; Reference counting; TInterfacedObject

Beating The System: Delphi Meets IntelliMouse
Authors	Dave Jewell		Type: Article
Issue	32 : April 1998	View article	View source code
Summary	Dave Jewell has been playing with his fancy new wheel-equipped mouse and has found how to make your applications take full advantage of its features
Keywords	Beating the System; Custom Windows messages; Detecting Windows 98; GetVersionEx; IntelliMouse; Mouse programming; Mouse scrolling; Mouse wheel; Mouse wheel messages; RegisterWindowMessage; Three-button mouse; WM_MBUTTONDBLCLK; WM_MBUTTONDOWN; WM_MBUTTONUP; Windows 98; Windows NT 4, NT 5; Windows Version

Sweet Dreams
Authors	Julian Bucknall		Type: Article
Issue	32 : April 1998	View article	View source code
Summary	Julian Bucknall writes some easier to use file search routines, with regular expression matching for filenames
Keywords	Better FindFirst, FindNext; Directory search; File finding; File name matching; File search; FindClose; GREP; Greedy algorithms; Linked list; Parsing; Pattern matching; Regular expression engine; Regular expressions; Text matching; Wildcards

Surviving Client/Server: OLE Automation With SQL Server
Authors	Steve Troxell		Type: Article
Issue	32 : April 1998	View article	View source code
Summary	Steve Troxell creates an OLE interface between Delphi and Microsoft's relational database management system, using Distributed Management Objects
Keywords	BDE disadvantages; COM and DCOM; Client/server; DMO; DMO type library; MS SQL Server; OLE Automation; OLE interface for SQL Server; SQL; SQL Server API; Surviving Client/Server; Type library editor

Surviving SQL: TBatchMove
Authors	Steve Troxell		Type: Article
Issue	32 : April 1998	View article	No source code
Summary	TBatchMove can be awfully slow: Steve Troxell shows how to move data between SQL tables easily and much more quickly
Keywords	Changing table structure; Copying database tables; SQL; SQL INSERT; Surviving SQL; TBatchMove too slow

Under Construction: A Query HTML CGI-Form Wizard
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	32 : April 1998	View article	View source code
Summary	Tired of hand-coding all your CGI forms in HTML? No problem, `Dr.Bob' Swart has a wizard to do the job for you, enhancing Delphi 3's Web Modules. Along the way he visits property and components editors too
Keywords	CGI forms; Component Editors; Delphi 3; HTML form wizard; Internet; Packages; Property Editors; SQL query to HTML converter; Under Construction; WWW; Web applications; Wizards and Experts

One Last Compile...
Authors			Type: Article
Issue	32 : April 1998	View article	No source code
Summary	Thanks to Delphi, you may never have to visit your kitchen again
Keywords	One Last Compile...

Delphi Meets COM: Part 5
Authors	Dave Jewell		Type: Article
Issue	32 : April 1998	View article	No source code
Summary	This month Dave Jewell dives into OLE automation, covering OLE controllers, early and late binding, OLE servers, type libraries and more
Keywords	Automation server; COM programming; Dispinterface; Dual interfaces; Early binding; IDispatch; Late binding; OLE Automation; OLE controllers; OLE interfaces; OLEVariant type; Type library editor; Variant type

Form Printing DOS-Style
Authors	Paul Warren		Type: Article
Issue	32 : April 1998	View article	View source code
Summary	Paul Warren digs out some old DOS programming techniques and constructs some surprisingly handy form printing routines that don't need any fancy reporting components
Keywords	DOS-style forms; Fonts; Form files; Forms without report tools; Inserting data into forms; Printing forms

Hooks Unsnagged
Authors	Warren Kovach		Type: Article
Issue	32 : April 1998	View article	View source code
Summary	Warren Kovach has discovered why Windows hook programs written in Delphi (and other environments too) can cause access violations and provides some fixes
Keywords	Delphi 3; Error 216 on enter password; Masking floating point error; Non-Microsoft compilers; OpenGL and hooks; OpenGL floating point errors; Password dialog conflicts; Trapping keystrokes; Windows hook errors; Windows hooks

Grid Cell Positioning
Authors	Brian Long		Type: Clinic
Issue	32 : April 1998	View article	View source code
Summary	Grid Cell Positioning
Keywords	Change current DBGrid cell; Grids; SelectedIndex

Application And Window Handles
Authors	Brian Long		Type: Clinic
Issue	32 : April 1998	View article	View source code
Summary	Application And Window Handles
Keywords	Application handles; Calling other programs; CreateProcess; IsWindowVisible; Primary thread handle; Program instance handle; ShellExecute; ShellExecuteEx; Window handles

DLL Failure
Authors	Brian Long		Type: Clinic
Issue	32 : April 1998	View article	View source code
Summary	DLL Failure
Keywords	.DLL extension required; DLL import declaration; DLL not found error; Moving 16-bit to 32-bit

Playing Videos
Authors	Brian Long		Type: Clinic
Issue	32 : April 1998	View article	View source code
Summary	Playing Videos
Keywords	AVI and WAV files; AVI or WAV as resource; Linking in resources; Merge resources into EXE; PlaySound; Playing videos; ResHandle; Resouce compiler; Resource scripts; SndPlaySound; TAnimate; TMediaPlayer; TResourceStream

Multiple Undo
Authors	Warren Kovach		Type: Article
Issue	33 : May 1998	View article	View source code
Summary	Large shrinkwrapped applications often have a multi-level undo capability built in: nice, but isn't it fiendishly complex to create? Not so, says Warren Kovach, who takes you through the process step by step, with example projects too
Keywords	Command objects; Convert keycode to character; Data structures; Drawing undo; EM_UNDO message; Extending TMemo undo; Multiple undo; Redo; Self-undoing objects; Stacks; TList as a stack object; Text editing undo; ToAscii; Undo; Undo in standard controls; WM_INITMENUPOPUP

Round & Round
Authors	Julian Bucknall		Type: Article
Issue	33 : May 1998	View article	View source code
Summary	Julian Bucknall goes round and round and round... and asks how random your numbers really are. Random number generators pop up surprisingly often and the numbers they generate can be surprisingly un-random!
Keywords	Chi-Square distribution; Coupon Collector's test; Degrees of freedom; Gap test; Linear congruential method; Middle-square method; Mitchell & Moore generator; Poker test; Random function; Random number generators; Random numbers; Randomize procedure; Sum of squares test; Testing randomness

Surviving Client/Server
Authors	Steve Troxell		Type: Article
Issue	33 : May 1998	View article	No source code
Summary	Steve Troxell describes code tables and how best to use them
Keywords	Client/server; Code tables; Lookup tables; SQL; Surviving client/server

Creating A File Packing List
Authors	Paul Warren		Type: Article
Issue	33 : May 1998	View article	View source code
Summary	Have you ever missed a key file out of a source code suite when sending it to someone else? Paul Warren has a nifty utility to fix just that problem, which also gives insight into parsing and searching
Keywords	Dependent units; File dependencies; File packing list; Files in uses clause; Files required by component; Missing files; Parsing source code files; Parsing uses clause; Recursion; Searching; Source dependency; TParser

Beating the System: Delphi Meets IntelliMouse, Part 2
Authors	Dave Jewell		Type: Article
Issue	33 : May 1998	View article	View source code
Summary	Dave Jewell wraps up his discussion of adding MS IntelliMouse support to your applications with a re-usable resource to make it ever so easy, plus clever code to IntelliMouse-enable the Delphi 3 IDE!
Keywords	Beating the system; Borland editor engine; DFWEDIT.DLL; Delphi 3 IDE; IDE enhancements; IntelliMouse; IntelliMouse in Delphi IDE; IntelliPoint software errors; MSH_WHEELSUPPORT_MSG; Mouse wheel; TDesktopForm; TEditWindow; TTimer problems; Timers without TTimer

Interposer Classes
Authors	Stephen Posey		Type: Article
Issue	33 : May 1998	View article	View source code
Summary	Stephen Posey describes a clever way of exposing extra (usually hidden) properties and methods, as well as adding new ones, in components without all the hassle of creating a new component.
Keywords	Add methods to component; Add properties to component; Amending existing components; Dummy classes; Expose Canvas in TPanel; Exposing hidden properties; Exposing private properties; Form inheritance in Delphi 1; Interposer classes; TApplication

Under Construction: Internet Database Applications
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	33 : May 1998	View article	View source code
Summary	In response to reader feedback, Bob Swart discusses how to create real-world CGI applications for the web without using Delphi 3's WebModules: this means you don't need the Client/Server Edition of Delphi 3 to create web apps!
Keywords	CGI actions; CGI applications; CGI form wizard; CGI performance problems; Database editing on internet; Error reporting tool; HTML forms; Internet; Under construction; Web applications; Web database application; Web with no web modules

One Last Compile...
Authors			Type: Article
Issue	33 : May 1998	View article	No source code
Summary	I know exactly what I want (he said)
Keywords	One last compile

Delphi Meets COM: Part 6
Authors	Dave Jewell		Type: Article
Issue	33 : May 1998	View article	View source code
Summary	Dave Jewell continues his in-depth trawl through the wonders of COM programming with an overview of ActiveX, including how to make your own ActiveX controls look truly professional
Keywords	ActiveX; Building ActiveX controls; Custom Windows 95 desktop; Delphi meets COM; Desktop is listview control; OCX; Progman window class; Program Manager; Read only property ActiveX; SHELLDLL_DefView; SysListView32; Version resource in ActiveX; Visual Basic 4 ActiveX

Radio Group Problem
Authors	Brian Long		Type: Clinic
Issue	33 : May 1998	View article	View source code
Summary	Radio Group Problem
Keywords	Access radio group members; Change cursor in radio group; ComponentState property; Controls property; Radio buttons; Radio group problem; cm_CursorChanged

Application Time-Out
Authors	Brian Long		Type: Clinic
Issue	33 : May 1998	View article	View source code
Summary	Application Time-Out
Keywords	Application Time-Out; CallNextHookEx; Close app after fixed time; Detect keyboard inactivity; Detect mouse inactivity; GetCurrentThreadID; SetWindowsHookEx; TTimer; Thread identified

Event Complexity
Authors	Brian Long		Type: Clinic
Issue	33 : May 1998	View article	View source code
Summary	Event Complexity
Keywords	Controlling chained events; Event complexity; Prevent on-click events

Updating System Files
Authors	Brian Long		Type: Clinic
Issue	33 : May 1998	View article	View source code
Summary	Updating System Files
Keywords	Abbreviate filename; MinimizeName; MoveFileEx; MoveFile_Delay_Until_Reboot; Updating System Files; Updating files in use; WinInit program; Windows NT

Real Time 3D
Authors	Ian Ringrose , Joseph Steel		Type: Article
Issue	34 : June 1998	View article	View source code
Summary	Ian Ringrose and Joseph Steel describe the development of a real time animated 3D graphics system in Delphi using OpenGL, with textures, transparency and fog effects. They even created a custom component along the way to make life simpler
Keywords	3D scale models; Animated graphics; Animation; Fog effects; OpenGL; OpenGL, Windows 95 problems; Real time 3D graphics; Silicon Graphics OpenGL; Transparency effects; VRML

Algorithms Alfresco: Love Plus One
Authors	Julian Bucknall		Type: Article
Issue	34 : June 1998	View article	View source code
Summary	In the first instalment of his brand new monthly column on matters algorithmic, Julian Bucknall describes ternary trees: combining the speed of access of a hash table and the alphabetically sorted nature of a binary tree.
Keywords	Algorithms Alfresco; Binary trees; Hash tables; Partial match searching; Searching algorithms; Storing sorted text strings; TStringList limitations; Ternary search trees; Trie

One Last Compile...
Authors			Type: Article
Issue	34 : June 1998	View article	No source code
Summary	Delphi, spitting and the path to true happiness.
Keywords	One last compile

Delphi For Time Travellers
Authors	Brandon Smith		Type: Article
Issue	34 : June 1998	View article	View source code
Summary	If you thought the year 2000 brings problems, try going backwards a few hundred years into the morass of historical calendar systems, with days missing here there and everywhere... But never fear, Brandon Smith has done his homework well and presents a custom component to make sense of it all.
Keywords	Calendar systems; Date problems; Dates in Delphi; Dates in different countries; DecodeDate; EncodeDate; Gregorian calendar; Julian calendar; Julian day numbering; Leap years; Length of a year; Non-existent dates; Problems with early dates; SYSUTILS; Scaliger cycle; TDateTimePicker; Year 1752; Year 2000

Surviving Client/Server: Object Oriented Databases
Authors	Steve Troxell		Type: Article
Issue	34 : June 1998	View article	No source code
Summary	Steve Troxell begins a tour of object oriented database systems this month, ebunking the jargon and showing how you can use them in practice, with hints on the real performance gains to be had
Keywords	Object identifiers; Object oriented databases; Relational database systems; Surviving client/server

Beating The System: Add Extra Richness To RichEdit Controls!
Authors	Dave Jewell		Type: Article
Issue	34 : June 1998	View article	View source code
Summary	Dave Jewell thinks Delphi's TRichEdit is great, but he knows it could be even better... This month our sleuth unpicks Microsoft's enhanced Rich Edit 2.0 DLL and shows how to use its snazzy added features in your Delphi projects: multi-level undo, Unicode, automatic URL detection and more
Keywords	Beating the System; CFE_LINK text effect; COMCTRLS unit; Common controls; Detecting URLs; Hyperlinks in rich text; RICHED.DLL; RICHED20.DLL; RICHED32.DLL; RTF format; Rich text; RichEdit 2.0; ShellExecute; TRichEdit; Windows 95; Windows 98; Windows NT; em_AutoURLDetect message

Under Construction: Database Web Server Extensions
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	34 : June 1998	View article	View source code
Summary	Following on from last month's instalment, Bob Swart shows how to convert a CGI database application into an ISAPI DLL, for dramatically improved performance, all without Web Modules (so Delphi 3 Client/Server is not a requirement!)
Keywords	CGI versus ISAPI; Debugging ISAPI DLLs; Getting web server info; ISAPI and BDE; ISAPI support units; ISAPI without Web Modules; Internet; IntraBob; Maximum BDE sessions; Multiple database sessions; Multithreading in web apps; TSession; Under construction; Updating ISAPI DLLs; Web applications; Web database applications; Web server; World Wide Web

Delphi Meets COM: Part 7
Authors	Dave Jewell		Type: Article
Issue	34 : June 1998	View article	View source code
Summary	Dave Jewell gets down and dirty with DAX: Delphi's ActiveX framework. He describes the code the wizard generates for you and how to tweak it to make your ActiveX controls even better
Keywords	$E extension directive; ActiveX property pages; ActiveX property sheets; Building ActiveX controls; COM programming; ComServ unit; ComServer variable; DLLRegisterServer; DefinePropertyPage; Delphi ActiveX framework DAX; Delphi meets COM; DllUnregisterServer; MODULES resource; RT_RCDATA resource type; TComServer

Bad Uninstall
Authors	Brian Long		Type: Clinic
Issue	34 : June 1998	View article	View source code
Summary	Bad Uninstall
Keywords	MultiEdit bad uninstall; Registry; Removing Delphi experts

Control Looping
Authors	Brian Long		Type: Clinic
Issue	34 : June 1998	View article	View source code
Summary	Control Looping
Keywords	Components array; Control looping; Controls array; FindComponent; Finding all controls on form; Loop through controls

BDE Errors
Authors	Brian Long		Type: Clinic
Issue	34 : June 1998	View article	View source code
Summary	BDE Errors
Keywords	BDE error codes; BDE error messages; BDE import units; BDE.INT; Borland Database Engine; DBIERRS.INT; DBIPROCS.INT

Trapping Database Exceptions
Authors	Brian Long		Type: Clinic
Issue	34 : June 1998	View article	View source code
Summary	Trapping Database Exceptions
Keywords	Default exception handler; EDBEngineError exception; Exeption handling; Global exception handler; Trapping database exceptions; Trapping key violations

Captionless Dragging
Authors	Brian Long		Type: Clinic
Issue	34 : June 1998	View article	View source code
Summary	Captionless Dragging
Keywords	Dragging captionless forms; Dragging controls on a form; Moving windows in code; sc_Move; wm_NCHitTest; wm_SysCommand message

Resetting Autoincrement Fields
Authors	Brian Long		Type: Clinic
Issue	34 : June 1998	View article	View source code
Summary	Resetting Autoincrement Fields
Keywords	DbiDoRestructure; Paradox auto increment; Reset autoincrement fields

Delphi 4 Preview
Authors	Brian Long		Type: Article
Issue	35 : July 1998	View article	No source code
Summary	Brian Long summarises the new goodies to be found in Delphi's latest version, due to hit the streets as you read this...
Keywords	Delphi 4 preview

Beating The System: RichEdit Controls, Part 2
Authors	Dave Jewell		Type: Article
Issue	35 : July 1998	View article	View source code
Summary	Dave Jewell concludes his look at Rich Edit 2.0, showing how to add multiple undo/redo and encapsulate the URL hyperlink functionality
Keywords	Beating the System; Hyperlinks; Multiple undo/redo; Rich Edit 2.0; Rich text editor; RichEdit controls; Text editor; Undo and redo

DBGrid Multi-Selection
Authors	Dave Bolt		Type: Article
Issue	35 : July 1998	View article	View source code
Summary	Dave Bolt discusses how to implement multi-selection in a DBGrid control
Keywords	DBGrid multiple selection; Database bookmarks; Selected rows in DBGrid; TBookmarkList; dgMultiSelect

Under Construction: Automated Email
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	35 : July 1998	View article	View source code
Summary	Bob Swart shows how to automatically send email from your webserver using the SMTP protocol (but not for Spam of course, ok everyone?!)
Keywords	Automated email; Internet; Mail servers; SMTP email protocol; Sending email from webserver; TCP/IP protocol; TClientSocket; Under construction

The Rise And Fall Of TObject
Authors	Hallvard Vassbotn		Type: Article
Issue	35 : July 1998	View article	View source code
Summary	Hallvard Vassbotn shares the ins and outs of TObject, showing how to do your own memory management and save some precious kilobytes
Keywords	CleanupInstance; Constructor and destructor; FreeInstance; InitInstance; Memory management; NewInstance; Object construction; Object destruction; TObject; _ClassCreate

Algorithms Alfresco: Call Me
Authors	Julian Bucknall		Type: Article
Issue	35 : July 1998	View article	View source code
Summary	Julian Bucknall gives us the low-down on recursion: what is it, when to use it and when to avoid it, and how to avoid it when you need to!
Keywords	Algorithms Alfresco; Fibonacci numbers; Hash tables: correction; Recursion; Recursive routines; Removing recursion; Stack usage

Manipulating Runtime Type Information
Authors	Philip Brown		Type: Article
Issue	35 : July 1998	View article	View source code
Summary	Phil Brown shows how to manipulate runtime type information (RTTI) to advantage in your projects, describing a neat technique for writing and reading object data using RTTI
Keywords	Exporting data using RTTI; Importing data using RTTI; RTTI; RTTI for data storage; RTTI for databases; Runtime type information; SQL

Surviving Client/Server: ODBMS In Practice, Part 1
Authors	Steve Troxell		Type: Article
Issue	35 : July 1998	View article	No source code
Summary	Steve Troxell continues his tour of Object Oriented Database Systems, this month showing some examples using Computer Associates' Jasmine database system
Keywords	Computer Associates Jasmine; ODBMS; Object oriented databases; Object query language

One Last Compile...
Authors			Type: Article
Issue	35 : July 1998	View article	No source code
Summary	Databases: the painful truth
Keywords	One last compile

Delphi Meets COM: Part 8
Authors	Dave Jewell		Type: Article
Issue	35 : July 1998	View article	View source code
Summary	Dave Jewell wraps up his discussion of ActiveX controls and reveals another of Delphi's intimate secrets...
Keywords	ActiveX control libraries; ActiveX property pages; BorIDE unit; Building ActiveX controls; COM programming; Delphi 4 COM support; Delphi meets COM; LibIntf unit; Native Tools API; TLibAppBuilder

BDE Administrator Amnesia
Authors	Brian Long		Type: Clinic
Issue	35 : July 1998	View article	View source code
Summary	BDE Administrator Amnesia
Keywords	BDE Administrator problems

Bad BDE Installation
Authors	Brian Long		Type: Clinic
Issue	35 : July 1998	View article	View source code
Summary	Bad BDE Installation
Keywords	BDE installation problems; Borland Database Engine; InstallShield and BDE; Registry

Dynamic Fonts
Authors	Brian Long		Type: Clinic
Issue	35 : July 1998	View article	View source code
Summary	Dynamic Fonts
Keywords	AddFontResource; Dynamic fonts; RemoveFontResource

Cached Updates Problem
Authors	Brian Long		Type: Clinic
Issue	35 : July 1998	View article	View source code
Summary	Cached Updates Problem
Keywords	Cacded updates problem; Multiple lock files; Paradox databsases

Erratic MDI Menu
Authors	Brian Long		Type: Clinic
Issue	35 : July 1998	View article	View source code
Summary	Erratic MDI Menu
Keywords	MDI menu problems

Shipping Bitmaps
Authors	Brian Long		Type: Clinic
Issue	35 : July 1998	View article	View source code
Summary	Shipping Bitmaps
Keywords	Including bitmap resources; Linking in resource files; Resource compiler; Resources in DLL; Resources in EXE; Resources in packages

Graphic File Extensions
Authors	Brian Long		Type: Clinic
Issue	35 : July 1998	View article	View source code
Summary	Graphic File Extensions
Keywords	File open dialogs; FileFormatList; Graphic file extensions; GraphicFileMask

Office Integration
Authors	Brian Long		Type: Clinic
Issue	35 : July 1998	View article	View source code
Summary	Office Integration
Keywords	Microsoft Outlook; OLE Automation; Working with MS Office

Mix-In It Up In Delphi
Authors	David Baer		Type: Article
Issue	36 : August 1998	View article	View source code
Summary	David Baer shows that Interfaces are useful for more things than COM programming, with a simple example of a server component communicating with client components
Keywords	COM programming; GUIDs and as operator; IUnknown; Interfaces; Mix-In classes; Multiple inheritance; No need for GUIDs; QueryInterface; TInterfacedObject; TPersistent; _AddRef; _Release

Under Construction: RobotBob Internet Agent
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	36 : August 1998	View article	View source code
Summary	Bob Swart builds on his automatic email project from last month to show how to create internet agents and robots to automate tedious tasks like checking websites for new material and fetching files via FTP
Keywords	CGI; Delphi 4 dynamic arrays; Email mailing lists; FTP; FTP downloading; Internet agents; Internet robots; InternetReadFile; Listserver program; POP3 mail; Reading email; Remotely end program; Remotely start program; Run program by email; SMTP mail; Sending email; UUENCODE; Under Construction; WININET

ImageList In Depth
Authors	Dave Collie		Type: Article
Issue	36 : August 1998	View article	View source code
Summary	Dave Collie describes the power that lurks in the TImageList component: it can do far more than immediately meets the eye
Keywords	Image masks; Image overlays; ImageList drag and drop; Overlaid images; TImageList; Transparency in images

Algorithms Alfresco: Hunting High And Low
Authors	Julian Bucknall		Type: Article
Issue	36 : August 1998	View article	View source code
Summary	Julian Bucknall discusses text searching using the Boyer-Moore algorithm, showing how it is so much faster than Delphi's built-in Pos function
Keywords	Algorithms Alfresco; Boyer-Moore algorithm; Pattern matching; Pos function; String searching; Ternary tree error corrected; Text searching

New COM Features In Delphi 4: An Overview
Authors	Steve Teixeira		Type: Article
Issue	36 : August 1998	View article	No source code
Summary	Steve Teixeira has taken the reins of our series on COM programming from Dave Jewell and this month introduces the new COM-related goodies to be found in Delphi 4
Keywords	ActiveX control development; ActiveX framework; Aggregation; Apartment threading; Both threading; COM object wizard; COM programming; Delphi 4; Event support; Free threading; IObjectControl; Implementation by delegation; Implements directive; Microsoft Transaction Server; Multi-threading; OLE automation; Remote DataModules; Single threading; Threading models

Using Windows Resources
Authors	Philip Brown		Type: Article
Issue	36 : August 1998	View article	View source code
Summary	Phil Brown gives us some practical hints on using Windows resources to best advantage in our Delphi apps
Keywords	$R compiler directive; BITMAP resource; CURSOR resource; ICON resource; Linking resource files; RCDATA resource; Resource compiler; Resource file syntax; Resource files; STRINGTABLE resource; TResourceStream; Windows resources

One Last Compile...
Authors			Type: Article
Issue	36 : August 1998	View article	No source code
Summary	Delphi 4, here I come..
Keywords	One last compile

Beating The System: A Windows 98 File Association Un-Mangler
Authors	Dave Jewell		Type: Article
Issue	36 : August 1998	View article	View source code
Summary	Dave Jewell begins work on a Windows file association un-mangler, teaching us a lot about the ins and outs of the registry along the way. Plus, he outlines what there is (or isn't) for programmers to get excited about in Windows 98...
Keywords	Beating the System; Chached INI files; HKEY_CLASSES_ROOT; Registry; Registry hives; THeaderControl; TMemIniFile; TRegIniFile; TRegistry; Windows 98; Windows 98 for programmers; Windows NT and INI files; Windows file associations

Optimising Form Handling
Authors	Philip Brown		Type: Article
Issue	36 : August 1998	View article	View source code
Summary	Phil Brown has a neat idea to minimise memory use for projects with lots of forms: a forms cache, which can take account of varying memory availability on users' machines to ensure your apps run sweetly
Keywords	Application.CreateForm; AutoCreate forms; Creating forms on demand; Form cache; Form caching; Form handling; Minimising memory use

David And Goliath
Authors			Type: Article
Issue	36 : August 1998	View article	No source code
Summary	A faded and dusty manuscript reveals a strange and disturbing tale...
Keywords	David and Goliath

Incrementing A Date
Authors	Brian Long		Type: Clinic
Issue	36 : August 1998	View article	View source code
Summary	Incrementing A Date
Keywords	Date arithmetic; Incrementing dates

Access 97 Support
Authors	Brian Long		Type: Clinic
Issue	36 : August 1998	View article	View source code
Summary	Access 97 Support
Keywords	Access 97 support; BDE versions; DAO support in BDE

Access Security
Authors	Brian Long		Type: Clinic
Issue	36 : August 1998	View article	View source code
Summary	Access Security
Keywords	Access SYSTEM DATABASE; Access security and BDE

Memory Management Woes
Authors	Brian Long		Type: Clinic
Issue	36 : August 1998	View article	View source code
Summary	Memory Management Woes
Keywords	Free; Freeing objects; Is an object disposed; Memory management; Set object pointer to nil

Forcing Windows Shutdown
Authors	Brian Long		Type: Clinic
Issue	36 : August 1998	View article	View source code
Summary	Forcing Windows Shutdown
Keywords	Closing Windows; ERROR_NO_SUCH_PRIVILEGE; EWX_FORCE flag; ExitWindowsEx; Forcing Windows shutdown; SE_SHUTDOWN_NAME; SysErrorMessage; Win32Check

Delphi Colour Changes
Authors	Brian Long		Type: Clinic
Issue	36 : August 1998	View article	View source code
Summary	Delphi Colour Changes
Keywords	Delphi IDE colors; Delphi IDE colours; Delphi registry area

List Of Numbers
Authors	Brian Long		Type: Clinic
Issue	36 : August 1998	View article	View source code
Summary	List Of Numbers
Keywords	Storing a list of numbers; TList; TStringList.Objects

Delphi 4 Bugs And Fixes
Authors	Hallvard Vassbotn , Dave Jewell		Type: Article
Issue	37 : September 1998	View article	View source code
Summary	Hallvard Vassbotn and Dave Jewell provide news of some glitches in the first release of Delphi 4
Keywords	Delphi 4 bugs and fixes; Delphi bug list; Cached updates bug; TListBox bug; Listbox bugs Delphi 4; Delphi 4 update; ListBox.ItemIndex; LB_GETCURSEL

Integrating With Outlook And Exchange
Authors	Berend de Boer		Type: Article
Issue	37 : September 1998	View article	View source code
Summary	Berend de Boer shows how to create applications which integrate with Microsoft's Outlook and Exchange
Keywords	Microsoft Outlook; Microsoft Exchange; Email; MAPI; COM; IExchExt; EECONTEXT_VIEWER; IExchExtCommands; IExchExtCallback

Algorithms Alfresco: That's The Way It Goes
Authors	Julian Bucknall		Type: Article
Issue	37 : September 1998	View article	View source code
Summary	Julian Bucknall explains sorting algorithms: the good, the bad and the ugly. Get your deck of playing cards out, it's time for some lab work! Which is it to be, bubble, shaker, selection, insertion, Shell or quicksort?
Keywords	Algorithms Alfresco; Sorting algorithms; Bubble sort; Shaker sort; Insertion sort; Improved insertion sort; Sorting performance; Quadratic time algorithms; Shellsort; Quicksort; Recursion; Choosing a sorting algorithm

Beating the System: Windows 98 File Associations, Part 2
Authors	Dave Jewell		Type: Article
Issue	37 : September 1998	View article	View source code
Summary	Dave Jewell concludes the construction of his Windows file association un-mangler, so now you can happily undo the damage wreaked by a certain well-known software manufacturer...
Keywords	Beating the System; File associations; Registry; Windows 98

Dynamic Arrays
Authors	Brian Long		Type: Article
Issue	37 : September 1998	View article	View source code
Summary	Arrays are incredibly useful and crop up in just about every project we create. But "out of the box" they are rather inflexible as you need to decide upfront how big your array should be. Not any more, Brian Long explains how to make your arrays dynamic: resizeable and powerful, for Delphi 1 right through to Delphi 4, with its new built-in dynamic arrays feature.
Keywords	Dynamic arrays; Heap-based arrays; Generic types; Range checking; Pointer dereferencing; GetMem and AllocMem; ReAllocMem; Allocating memory on heap; TList as a dynamic array; Paradox style dynamic arrays; TStringList as dynamic array; Non-integer array indexes; Array idex must be ordinal; Variant array; Delphi 4 dynamic arrays

ICon 98: Conference Report
Authors	David Baer		Type: Article
Issue	37 : September 1998	View article	No source code
Summary	David Baer is fresh back from the annual Inprise conference, held this year in Denver. He brings us his own personal report with all the highlights and lowlights (what was that, they ran out of beer...?!)
Keywords	ICon 98 conference report; Inprise 1998 conference

Surviving Client/Server: ODBMS In Practice, Part 2
Authors	Steve Troxell		Type: Article
Issue	37 : September 1998	View article	No source code
Summary	Steve Troxell continues his examination of object oriented database systems, with some practical Delphi examples using Jasmine from Computer Associates
Keywords	Surviving Client/Server; Client/Server; Object oriented databases; ODBMS; Computer Associates Jasmine; ODBMS in practice; ODBMS example

Under Construction: Delphi 4 Web Broker Technology
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	37 : September 1998	View article	View source code
Summary	Bob Swart has been checking out what's new in internet application support in Delphi 4, now available as an add-on for Professional Edition users too
Keywords	Under Construction; Delphi 4 web broker; Web applications; Internet applications; TDataSetPageProducer; Web Application Wizard; TPageProducer; Web module application; ISAPI; Internal Server Error 500; IntraBob CGI debugger/tester; Debugging ISAPI and NSAPI; Multi-threading in ISAPI; IsMultiThread

COM Corner: ActiveX Data Binding In Delphi
Authors	Steve Teixeira		Type: Article
Issue	37 : September 1998	View article	View source code
Summary	Steve Teixeira shows how easy it is to create 'bound' ActiveX controls in Delphi 4 using the wonders of COM programming, able to work with data from whatever source you like...
Keywords	COM programming; ActiveX data binding; Bound ActiveX controls; Data-aware ActiveX; Creating ActiveXs; Writing ActiveXs; ICursor; ICursorMove; VARFLAG_FBINDABLE; VARFLAG_FREQUESTEDIT; VARFLAG_FDISPLAYBIND; IPropertyNotifysinks; Bindable properties; TActiveXControl

Delphi Component Templates
Authors	Brian Long		Type: Clinic
Issue	37 : September 1998	View article	View source code
Summary	Delphi Component Templates
Keywords	Delphi component templates; Copying component templates

Current Printer?
Authors	Brian Long		Type: Clinic
Issue	37 : September 1998	View article	View source code
Summary	Current Printer?
Keywords	Getting current printer; Printers unit; AssignPrn; PrinterIndex

Export To Excel
Authors	Brian Long		Type: Clinic
Issue	37 : September 1998	View article	View source code
Summary	Export To Excel
Keywords	Exporting to Excel; TBatchMove

Flashing Text
Authors	Brian Long		Type: Clinic
Issue	37 : September 1998	View article	View source code
Summary	Flashing Text
Keywords	Flashing text

Microsoft Internet Mail Style Application
Authors	Brian Long		Type: Clinic
Issue	37 : September 1998	View article	View source code
Summary	Microsoft Internet Mail Style Application
Keywords	Internet mail style app; Login forms; Form with no taskbar entry; TApplication; MDI; Ws_Ex_ToolWindow; Remove taskbar entry; ShowWindow; Forms with different icons; CreateParams

BDE Error Dialog
Authors	Brian Long		Type: Clinic
Issue	37 : September 1998	View article	View source code
Summary	BDE Error Dialog
Keywords	BDE error dialog; BDE error messages; Borland Database Engine; DBExcept unit; TDbEngineErrorDlg; EDBEngineError; Exception handling; HookExceptions; Application.OnException

Capturing DOS Output
Authors	Brian Long		Type: Clinic
Issue	37 : September 1998	View article	View source code
Summary	Capturing DOS Output
Keywords	Capturing DOS output; Capturing redirected output; DOS redirection; CreateProcess; Command.com

One Last Compile
Authors			Type: Article
Issue	37 : September 1998	View article	No source code
Summary	Rolling back the frontiers
Keywords	One last compile

Algorithms Alfresco: Like A Tattoo, Introducing Graphs
Authors	Julian Bucknall		Type: Article
Issue	38 : October 1998	View article	View source code
Summary	No, not those pretty things you do on squared paper, but computer science graphs (used, for example, in calculating the smallest distance to drive between appointments in several places). Clever stuff from Julian Bucknall...
Keywords	Algorithms Alfresco; Graph algorithms; Scheduling algorithms; Computer science graphs; Network of nodes; Directed graphs: digraphs; Labeled graphs; Weighted graphs; Gantt chart; Travelling salesman; Matrix, matrices; Triangular matrix; Linked lists; Head and tail nodes; Spanning tree

Building A Parsing Component
Authors	Paul Warren		Type: Article
Issue	38 : October 1998	View article	View source code
Summary	Paul Warren found he got more projects that involved parsing some kind of file to extract information from it. So he sat down and wrote a suite of parsing components to make life easier. His article describes the implementation of parsers for text, comma-separated data, HTML and Delphi Object Pascal code.
Keywords	Parsing components; Text parsing; HTML parsing; Parsing Pascal code; Parsing Delphi code; TParser; Component wrapper; Converting Pascal to HTML; Source code cross-reference; Parsing comma-delimited data

Under Construction: MIDAS, CORBA And TClientDataSet
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	38 : October 1998	View article	No source code
Summary	Multi-tier architecture is all the rage and Bob Swart provides a timely and practical introduction to Delphi 4's support to help you get started.
Keywords	Under Construction; MIDAS; CORBA; TClientDataSet; Multi-Tier computing; COM and DCOM; Distributed applications; Remote Data Module; MIDAS sever and client

Beating the System: A Delphi Version Reporting Component
Authors	Dave Jewell		Type: Article
Issue	38 : October 1998	View article	View source code
Summary	Dave Jewell unravels Microsoft's VERSION resource to create a neat way of using the information contained in your applications at runtime
Keywords	Beating the System; VERSION resource; Getting version information; Version component; VERSION.DLL; GetFileVersionInfoSize; VER.DLL; Versioning API; VS_VERSION_INFO; VS_FIXEDFILEINFO; ToolServices; EXPTINTF unit; ToolServices in components

Creating A Delphi Build Process
Authors	Dave Collie		Type: Article
Issue	38 : October 1998	View article	View source code
Summary	Dave Collie discusses the creation of an automated build process for your Delphi projects, including EXEs, DLLs, resource and help files and so on. Ideal for those working as part of a development team, or where a product includes more than one application.
Keywords	Building projects; Delphi build process; Command line compiler; Compiler configuration files; DCC32.EXE

Com Corner: Distributed Computing
Authors	Steve Teixeira		Type: Article
Issue	38 : October 1998	View article	No source code
Summary	Steve Teixeira continues our series on COM progamming with a lucid explanation of the pros and cons of DCOM and CORBA, helping you to choose the right option for your project. Are you drowning in the alphabet soup of acronyms? Don't miss Steve's explanation.
Keywords	COM Corner; COM programming; Choosing CORBA or DCOM; Distributd computing; Middleware; Object request broker ORB

Surviving Client/Server: Interactive Query Building
Authors	Steve Troxell		Type: Article
Issue	38 : October 1998	View article	View source code
Summary	Steve Troxell discusses how to implement interactive query building to give your users the power to create their own queries without learning SQL.
Keywords	Surviving Client/Server; Client/server; Interactive query building; SQL; Generating SQL; End user queries

Creating TTables And TFields At Runtime
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	38 : October 1998	View article	View source code
Summary	Bob Swart describes how to create tables and fields on the fly at runtime to make life easier when distributing your database applications.
Keywords	Creating tables and fields; TField; TTable; Generating tables at runtime; Generating fields at runtime; Get field info for tables

One Last Compile...
Authors			Type: Article
Issue	38 : October 1998	View article	No source code
Summary	The rock pools of Delphi
Keywords	One last compile...

Undocumented Delphi 4
Authors	Brian Long		Type: Clinic
Issue	38 : October 1998	View article	View source code
Summary	Undocumented Delphi 4
Keywords	Undocumented Delphi 4; Delphi 4 command line; Delphi 4 registry settings; Delphi 4 easter eggs

Stopping Windows Shutdown
Authors	Brian Long		Type: Clinic
Issue	38 : October 1998	View article	View source code
Summary	Stopping Windows Shutdown
Keywords	Stopping Windows shutdown; Preventing Windows shutdown; OnCloseQuery; CanClose; wm_QueryEndSession

Program Running Upon Windows Start-Up
Authors	Brian Long		Type: Clinic
Issue	38 : October 1998	View article	View source code
Summary	Program Running Upon Windows Start-Up
Keywords	Program runs on startup; Restart program on startup; Registry RunOnce setting; wm_EndSession

IDE Keyboard Problem
Authors	Brian Long		Type: Clinic
Issue	38 : October 1998	View article	View source code
Summary	IDE Keyboard Problem
Keywords	IDE keyboard problem; Trapping keystrokes

Keystroke Interception
Authors	Brian Long		Type: Clinic
Issue	38 : October 1998	View article	View source code
Summary	Keystroke Interception
Keywords	Keystroke interception; Trapping keystrokes; Intercepting keystrokes; Keyboard; OnKeyDown; Keystroke handling; wm_KeyDown; wm_Char; TranslateMessage; wm_KeyUp; Virtual key codes; vk_ key codes; WinTypes unit; Windows unit; wm_SysKeyDown; wm_SysKeyUp; wm_SysChar; Shift, Alt, Ctrl keys; wm_MenuChar

Dynamic Fonts Update
Authors	Brian Long		Type: Clinic
Issue	38 : October 1998	View article	View source code
Summary	Dynamic Fonts Update
Keywords	Dynamic fonts update; Loading fonts at runtime; Font names; wm_FontChange

Erratic MDI Menu Update
Authors	Brian Long		Type: Clinic
Issue	38 : October 1998	View article	View source code
Summary	Erratic MDI Menu Update
Keywords	Erratic MDI menu update; LockWindowUpdate; wm_SetRedraw

Base64 MIME Encoding
Authors	Damon Matthews		Type: Article
Issue	39 : November 1998	View article	View source code
Summary	Damon Matthews describes how to implement Base64 MIME encoding and decoding of binary data: very useful if you have an application which you need to send email with binary attachments from
Keywords	MIME encoding; Base64 MIME; Email; Binary files; Convert binary to ASCII; EBCDIC; Internet; RFC 1521; Binary attachments; UUEncoding; XXEncoding; Quoted printable encoding

Slimming The Fat Off Your Apps
Authors	Hallvard Vassbotn		Type: Article
Issue	39 : November 1998	View article	View source code
Summary	Hallvard Vassbotn wants to slim the fat off your software: tune in here if you want [your programs] to be leaner and fitter...
Keywords	Unit initialization section; Delphi code generation; Delphi on Windows NT; Delphi IDE memory use; Unit finalization section; CPU window; Exit procedures; Delphi generates extra code; Reducing memory usage; Long strings; system._initexe; system.initunits; Memory leaks in Delphi 2; Reference counted variables; Reference counting; Reduce memory use

New Delphi 4 User Interface Features
Authors	Warren Kovach		Type: Article
Issue	39 : November 1998	View article	View source code
Summary	Warren Kovach checks out some of the new user interface features which were introduced with Delphi 4, including bitmaps on menus, floating dockable toolbars and more.
Keywords	Delphi 4 user interface; New user interface features; Office 97 look and feel; Menus with bitmaps; TAction and TActionList; TMenuItem; Action property; 3D menus; Toolbars as menus; TToolBar; TToolButton; COMCTL32.DLL ver 4.72; Constraints property; WM_GETMINMAXINFO; Maximum form size; Minimum form size; TControlBar; Floating, dockable toolbars; Docking; Dockable tool windows; dkDock DragKind; DockSite; TMonthCalendar; TPageScroller

One Last Compile...
Authors			Type: Article
Issue	39 : November 1998	View article	No source code
Summary	Delphi Goes To Hollywood
Keywords	One last compile...

COM Corner: Automation Events
Authors	Steve Teixeira		Type: Article
Issue	39 : November 1998	View article	View source code
Summary	Steve Teixeira explains the mysteries of events in COM programming: if you've avoided them until now or bravely wrestled with implementation, help is at hand...
Keywords	COM Corner; COM programming; Automation events; OLE Automation; Delphi 4; Events interface; Outgoing interface; Multicasting; IID; Interface identification; IConnectionPointContainer; Connection point; FindConnectionPoint; IConnectionPoint; GetConnectionInterface; Type library editor; Event sink; Server source; InterfaceConnect; InterfaceDisconnect

Algorithms Alfresco: Priority Queues And Heapsort
Authors	Julian Bucknall		Type: Article
Issue	39 : November 1998	View article	No source code
Summary	To progress his discussion of graph algorithms Julian Bucknall takes a slight detour to discuss priority queues and how to work with them, handily showing how to implement the heapsort algorithm along the way too.
Keywords	Algorithms Alfresco; Priority queue; Heapsort; Graph algorithms; FIFO and LIFO; Queues; Tree balancing algorithms; Binary tree; Heap data structure; Binary tree as array; Sorting; Floyd's algorithm

Under Construction: Website Visitor Tracking
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	39 : November 1998	View article	View source code
Summary	Bob Swart builds on his introduction to distributed computing by creating a distributed application to monitor and track website visitors in full detail and glorious technicolor
Keywords	Under Construction; Website visitor tracking; Internet; Web applications; TClientDataSet; Multi-tier applications; ActiveForm; Website visitor log; HTTP_USER_AGENT; Obtaining user's IP address; BDE and CGI applications; BDE load/unload time; JavaScript; MIDAS; DCOM; OLEnterprise; ActiveX; TDCOMConnection

Beating the System: Surfing Explorer's Namespace
Authors	Dave Jewell		Type: Article
Issue	39 : November 1998	View article	View source code
Summary	Strange that Delphi doesn't provide a nice neat tree-view dialog to allow your users to select a directory, isn't it? Dave Jewell thought so too and set to with a will to wrap up the SHBrowseForFolder API routine for us and provide some useful enhancements too
Keywords	Beating the System; Windows Explorer namespace; Browsing for folders; Browsing for directory; Select directory or folder; Treeview of directories; SHBrowseForFolder; COMDLG32.DLL; SHELL32.DLL; SelectDirectory; TBrowseInfo; SHGetSpecialFolderLocation; bif_BrowseIncludeFiles; SHGetPathFromIDList; Callbacks

Preventative Programming: Code Smarter, Debug Less
Authors	Chad Z Hower		Type: Article
Issue	39 : November 1998	View article	View source code
Summary	Chad Z Hower wants us all to get home earlier and spend less time staring moodily at the debugger, so he's come up with a raft of hints, helps and tips to ensure our programs work right from the first compile
Keywords	Programming style; Setting up the Delphi IDE; Show component captions; Optimization; Stack frames; Range and overflow checking; Debugging options; Assert; Assertions; Typecasting guidelines; Exception handling; Date formats; FieldByName; Uses statement; Variants

Paradox Lock Information
Authors	Brian Long		Type: Clinic
Issue	39 : November 1998	View article	View source code
Summary	Paradox Lock Information
Keywords	Paradox lock information; Listing locks in use; dbiOpenLockList; BDE locks

Formatted Numbers
Authors	Brian Long		Type: Clinic
Issue	39 : November 1998	View article	View source code
Summary	Formatted Numbers
Keywords	Formatted numbers; Thousand separators; FloatToStrF; FormatFloat; StrToFloat

RichEdit Tabstops
Authors	Brian Long		Type: Clinic
Issue	39 : November 1998	View article	View source code
Summary	RichEdit Tabstops
Keywords	RichEdit tab stops; Tabstops

Environment Variables
Authors	Brian Long		Type: Clinic
Issue	39 : November 1998	View article	View source code
Summary	Environment Variables
Keywords	Environment variables; DOS environment; GetDOSEnvironment; GetEnvironmentStrings; Environment variables

Net File Directory
Authors	Brian Long		Type: Clinic
Issue	39 : November 1998	View article	View source code
Summary	Net File Directory
Keywords	Paradox net file directory; Change net file directory; Session.NetFileDir; TSession; sesNETFILE

SQL Dates
Authors	Brian Long		Type: Clinic
Issue	39 : November 1998	View article	View source code
Summary	SQL Dates
Keywords	SQL dates; Formatting dates in SQL

Folders And Shortcuts
Authors	Brian Long		Type: Clinic
Issue	39 : November 1998	View article	View source code
Summary	Folders And Shortcuts
Keywords	Creating Windows shortcuts; Creating program folders; Start menu; Desktop shortcuts; DDE; Program manager; Dynamic data exchange; Explorer shell; Program groups; Link files; IShellLink; IPersistFile; SHGetSpecialFolderLocation; Program folder location; Windows directory location; SHLOBJ unit; SHGetPathFromIDList; IMalloc; SHGetMalloc; Start menu folder; ShellExecute

Tooltip Characters
Authors	Brian Long		Type: Clinic
Issue	39 : November 1998	View article	View source code
Summary	Tooltip Characters
Keywords	Tooltips; Multiple line hints; Multi-line hints; Carriage return in hint; Carriage return in tooltip

Diagramming In Delphi
Authors	Jim Cooper		Type: Article
Issue	40 : December 1998	View article	View source code
Summary	Jim Cooper describes how to implement some easy to use diagramming classes in Delphi, with a website mapper showing the links between the files making up the site as a real-world example
Keywords	Diagramming; Diagrams; Line drawing; TGraphicControl; TCanvas; Drawing shapes; DrawText; TImageList; Image lists; Arrowhead; Mapping websites; Web applications; Parsing HTML; Parsing algorithms; Website diagram

Beating The System: Exploiting The System Image List
Authors	Dave Jewell		Type: Article
Issue	40 : December 1998	View article	View source code
Summary	by Windows, to give high-performance access to system-standard icons for drives, folders and so on. Plus, he uses these tricks to replace the clumsy Win3.x style drive list combobox Dave Jewell shows how to use the wealth of icons handily cached for us
Keywords	Beating the System; System image list; Using Windows icons; Cached icons; ImageIndex; TBrowseInfo.iImage; Windows shell; ExtractIcon; CommCtrl unit; ShellAPI unit; SHGetFileInfo; shgfiSmallIcon; shgfiLargeIcon; GetSystemMetrics; ImageList_GetIconSize; ImageList_Draw; TDriveComboBox; Disk drive icons; Windows 95 style drive icons; ImageList_Duplicate; ImageList is read only; GetLogicalDriveSettings; Logical drive letters; List of disk drives; File system information; FAT32; Drive Volume ID; WNetGetConnection

COM Corner: Namespace Extensions
Authors	Steve Teixeira		Type: Article
Issue	40 : December 1998	View article	View source code
Summary	Steve Teixeira has been battling with the complexities of namespace extensions. Tune in and see what's been keeping him awake at night: by following his guidelines you could well save yourself some sleep!
Keywords	COM Corner; COM programming; Shell namespace extensions; Extending Explorer namespace; Namespace junction point; IShellFolder; CreateViewObject; IShellView; Browsing COM servers; Finding COM servers; COM servers in Registry; PIDLs (piddles); CreateViewWindow; Self-registering COM server; Closing Shell not Windows; Debugging Shell extensions

Under Construction: Surfin' Your Surfers With TDecisionCube
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	40 : December 1998	View article	View source code
Summary	Bob Swart uses the decision cube technology included in Delphi Client/Server Suite to explore his website visitor data, gathered with last month's multi-tier website visitor tracking system
Keywords	Under Construction; TDecisionCube; Decision cubes; Delphi client/server edition; Website visitor tracking; TDecisionPivot; TDecisionQuery; TDecisionSource; TDecisionGrid; Decision Query Editor; SQL; DecisionGrid column width; DecisionGrid.ColWidths; TDecisionChart

Algorithms Alfresco: Silent Night
Authors	Julian Bucknall		Type: Article
Issue	40 : December 1998	View article	View source code
Summary	Julian Bucknall describes a rather curious visit he had recently and comes up with a stocking full of useful algorithms full of seasonal cheer...
Keywords	Algorithms Alfresco; Checksum algorithms; Verifying credit card number; Verifying ISBN number; Validation; Self-validating numbers; Date from day of week; EncodeDate; DayOfWeek; ISO date; ISO week of the year; Winsock; TCP/IP; Circular queue; Linear queue; Queue with overflow; Shuffling deck of cards; Shuffling an array; Fractions from decimal; Calculating fractions; Floating point inaccuracy; Continued fractions; Integer to roman numerals; Roman numbers; Convert Roman numbers

Manufacturing Fake Keystrokes
Authors	Brian Long		Type: Article
Issue	40 : December 1998	View article	View source code
Summary	Brian Long describes how to manufacture keystrokes in your applications, for example to initiate a sequence of actions programmatically
Keywords	Making fake keystrokes; Simulating keystrokes; Extended keystrokes; Programmatic keystrokes; wm_KeyDown; wm_KeyUp; wm_Char; Internal key state; PostVirtualKeyEvent; PenWindows DLL; KeyBd_Event; MapVirtualKey; Programmatic print screen; Screen capture; vk_SnapShot; Virtual key codes; GetMessageExtraInfo; SendInput; Numeric keypad; WinSight; Delphi 4 SendInput bugs; TAppBuilder; Input_Keyboard; Input_Hardware; TMouseInput; TKeyBdInput; THardwareInput; TInput; dwExtraInfo; dwExtractInfo is incorrect

Knitting Your Own Threads
Authors	Hallvard Vassbotn		Type: Article
Issue	40 : December 1998	View article	View source code
Summary	Hallvard Vassbotn has been investigating Delphi's support for multithreading and has found it helpful but lacking. So, this month he presents us with a better model for multithreaded applications
Keywords	Multithreading; Threads; Threading; Threadvar; TLS thread local storage; TlsAlloc; _GetTls; TlsIndex; TlsLast; InOutRes; RaiseList; TThread; IsMultiThread; Detecting multiple threads; BeginThread; Multithreading in the VCL; CreateThread; DelphiMM DLL; BorlandMM DLL; Threads in COM; EndThread; CreateThread; ExitThread; MainThreadID; PostThreadMessage; Thread objects; Synchronize; TThread.WaitFor; Waiting for thread to finish; TThread restrictions; TRTLCriticalSection; SyncObjs unit; TThreadList; CriticalSections; WaitForMultipleObjects; Delphi threading problems; Mutex and semaphore support; Waiting for multiple objects; THandleObject; Thread communication; Avoiding synchronize; WaitMessage; MsgWaitForMultipleObjects; Hooking OnIdle event; Action lists and threads

One Last Compile...
Authors			Type: Article
Issue	40 : December 1998	View article	No source code
Summary	Woke up this mornin' and had those old client/server blues
Keywords	One last compile...

Surviving SQL
Authors	Steve Troxell		Type: Article
Issue	40 : December 1998	View article	No source code
Summary	Steve Troxell has some handy tips to make life easier when customising your client/server systems for different clients
Keywords	Surviving SQL; SQL; Customising software

Enhanced Grids
Authors	Brian Long		Type: Clinic
Issue	40 : December 1998	View article	View source code
Summary	Enhanced Grids
Keywords	Enhanced grids; TDBGrid; TStringGrid; Vertical Scrollbars; Custom scrollbar behaviour; Customising scrollbars; TScrollBar; wm_VScroll; wm_HScroll; Scrollbar messages; sb_LineUp; sb_LineDown; sb_PageUp; sb_PageDown; sb_ThumbTrack; sb_EndScroll; sb_ThumbPosition; TScrollCode; Scrollbar events; OnScroll; Vertical scrollbar position; Scrollbar on TDBGrid

Restarting Windows
Authors	Brian Long		Type: Clinic
Issue	40 : December 1998	View article	View source code
Summary	Restarting Windows
Keywords	Restarting Windows; ExitWindowsEx; Rebooting computer; Shutting down Windows; Preventing reboot; Undocumented Windows 95; RestartDlg; Windows 95 restart dialog; FindWindow; RestartDialog

TStringGrid Coordinates
Authors	Brian Long		Type: Clinic
Issue	40 : December 1998	View article	View source code
Summary	TStringGrid Coordinates
Keywords	TStringGrid Coordinates; Selected cell TStringGrid; MouseToCell

Code Insight Customisation
Authors	Brian Long		Type: Clinic
Issue	40 : December 1998	View article	View source code
Summary	Code Insight Customisation
Keywords	Code Insight Customisation

Windows API Help Files
Authors	Brian Long		Type: Clinic
Issue	40 : December 1998	View article	View source code
Summary	Windows API Help Files
Keywords	Windows API Help Files; Win32 help files; Windows API help; Windows SDK

Design Patterns
Authors	Hallvard Vassbotn		Type: Article
Issue	41 : January 1999	View article	View source code
Summary	Hallvard Vassbotn has been checking out the 'gang of four' and considering their suggestions for a new approach to software design. In this article he discusses the best approach to implementing design patterns in Delphi, with the Singleton pattern presented as a working example
Keywords	Design patterns; Software design; Gang of four; Singleton design pattern; Gamma; Christopher Alexander; Object Pascal and C++; Software re-use (reuse); Class reference variables; Virtual constructors; Single instance of class; Singleton classes; Visibility of methods; Class procedures; Prevent object destruction; Prevent object creation; Assertions; Class fields

Surviving Client/Server: Replicating Server Constraints
Authors	Steve Troxell		Type: Article
Issue	41 : January 1999	View article	No source code
Summary	Steve Troxell has observed a constant struggle in client/server development about where and how to enforce data constraints. Here he discusses Delphi's solution to the problem, the data dictionary included from Delphi 2 up, with tips on using it for real and its drawbacks too
Keywords	Surviving client/server; Client/server; Replicating constraints; Server constraints; Client constraints; Data constraints; Data validation; Data integrity; Delphi data dictionary; SQL Explorer; CustomConstraint; DisplayFormat; MaxValue, MinValue; TField attribute sets; Database schema; BDE aliases; Check constraints; Data dictionary problems; BDE and Database aliases

Algorithms Alfresco: Join The Dots
Authors	Julian Bucknall		Type: Article
Issue	41 : January 1999	View article	View source code
Summary	Julian Bucknall bravely dives head first into the concluding part of his discussion of graph algorithms. Topological sorts, solving the travelling salesmen problem, the algorithms of Prim and Dijkstra, it's all here so come join the party...
Keywords	Algorithms alfresco; Graph algorithms; Topological sorting; Depth first traversal; Unconnected graphs; Directed acyclic graph: dag; Breadth first traversal; Shortest path algorithm; Priority first traversal; Prim's Algorithm; Spanning tree; Travelling salesmen problem; Traveling salesmen problem; NP-complete problems; Dijkstra's Algorithm; Lowest cost path

Under Construction: Usenet News Reading
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	41 : January 1999	View article	View source code
Summary	Bob Swart investigates how to write your very own Usenet Newsgroup reader in Delphi, from the ground up, covering the murky world of the NNTP protocol, sockets and more.
Keywords	Under Construction; Internet applications; NNTP protocolk; Newsgroup reader; Socket programming; Usenet newsgroups; Network news transport; TNMNNTP component; WinSock

Diagramming With Delphi, 2: The Adventure Continues
Authors	Jim Cooper		Type: Article
Issue	41 : January 1999	View article	View source code
Summary	Jim Cooper enhances the diagramming classes from last month, making the diagram elements movable and sizeable, adding the capability to store diagrams, and using all this functionality in a use case editor (for all you OO design methodology experts out there!)
Keywords	Diagramming; Line drawing; Diagrams; Diagram classes; Class methods; Saving objects to streams; RegisterClass; Sizing and moving components; Adding font property; Use case diagrams; Object oriented design; Use case editor; Unified Modelling Language; UML; Unified Process

Beating the System: Animated Icons And Cursors, 1
Authors	Dave Jewell		Type: Article
Issue	41 : January 1999	View article	View source code
Summary	Dave Jewell has been delving into the workings of the animated cursor files introduced by Microsoft in Windows NT, but now available in Windows 95 and 98. He presents code to allow you to easily include animated icons and cursors in your Delphi applications, with the minimum of fuss and resource use.
Keywords	Beating the System; Animated icons; Animated cursors; ANI files; RIFF file format; ICO files; Icon file format; TIconHeader; TIconDirEntry; Animation; Jiffy; dwJIFRate; Streaming animated icons; TGraphic streaming support; TImageList.SharedImages; Image List; System image list; MicroAngelo icon editor

One Last Compile...
Authors			Type: Article
Issue	41 : January 1999	View article	No source code
Summary	The source of all wisdom
Keywords	One last compile...

COM Corner: Automation Collections
Authors	Steve Teixeira		Type: Article
Issue	41 : January 1999	View article	View source code
Summary	Steve Teixeira observes that every language and programming method seems to have its approach to creating and using containers, and COM is no exception. This month he explains how to use COM collections to best effect
Keywords	COM Corner; COM programming; Automation collections; Containers; IDispatch; Containers in COM; Arrays in COM; _NewEnum; IEnumVARIANT; DISPID_NEWENUM; OleVariant; RegisterNonActiveX; ActiveX controls

Is This Property Published?
Authors	Brian Long		Type: Clinic
Issue	41 : January 1999	View article	View source code
Summary	Is This Property Published?
Keywords	Is a property published?; RTTI; Runtime type information

SQL Cursor Banished
Authors	Brian Long		Type: Clinic
Issue	41 : January 1999	View article	View source code
Summary	SQL Cursor Banished
Keywords	Do not use SQL cursor; Disable SQL cursor; crSQLWait cursor; Session.SQLCursor

Bracket Matching
Authors	Brian Long		Type: Clinic
Issue	41 : January 1999	View article	View source code
Summary	Bracket Matching
Keywords	Bracket matching in Delphi; Delphi IDE

Win32 System Modal Window
Authors	Brian Long		Type: Clinic
Issue	41 : January 1999	View article	View source code
Summary	Win32 System Modal Window
Keywords	Win32 system modal window; Windows NT; Screen saver; SystemParametersInfo; spi_ScreenSaverRunning

Bad Editor Line Numbers
Authors	Brian Long		Type: Clinic
Issue	41 : January 1999	View article	View source code
Summary	Bad Editor Line Numbers
Keywords	Incorrect editor line number; Delphi IDE

Backspace And New Line
Authors	Brian Long		Type: Clinic
Issue	41 : January 1999	View article	View source code
Summary	Backspace And New Line
Keywords	Backspace and new line; Delphi IDE

Edit-Less TDBGrid
Authors	Brian Long		Type: Clinic
Issue	41 : January 1999	View article	View source code
Summary	Edit-Less TDBGrid
Keywords	Non-editable TDBGrid; Prevent editing of TDBGrid; Allow editing of TStringGrid; TDBGrid.Options; dgEditing; TStringGrid.Options; goEditing

Control Panel Invocation
Authors	Brian Long		Type: Clinic
Issue	41 : January 1999	View article	View source code
Summary	Control Panel Invocation
Keywords	Starting control panel; Control panel applets; CPL files; Shell32.dll; shell.dll; RunDll32.exe; RunDll.exe; Running a DLL; control.exe

OpenGL: Under The Hood
Authors	John Hutchings		Type: Article
Issue	42 : February 1999	View article	View source code
Summary	John Hutchings shows how to create 3D graphics applications that will just blaze along, with a handy set of components to encapsulate the OpenGL API and shield us from all the gory details!
Keywords	OpenGL; 3D graphics; GLINT chipset; Vector drawing; Direct3D versus OpenGL; OpenGL components; OPENGL32.DLL; GLU32.DLL; Silicon Graphics OpenGL DLLs; Microsoft OpenGL DLLs; OpenGL 1.2 Delphi interface; Rendering context; wglCreateContext; glViewport; Coordinate systems; Head-up-display; 3D primitives; Text in OpenGL; Bitmaps in OpenGL; Textures; Fonts; Saving OpenGL images to disk; Rendering to a buffer

Implementing Active Server Pages
Authors	Eyal Hirsch		Type: Article
Issue	42 : February 1999	View article	View source code
Summary	Microsoft's ASP technology is becoming more and more widely used, but Delphi does not currently include ASP DLLs in the list of web application types it can generate. Eyal Hirsch demonstrates how we can plug the gap for ourselves
Keywords	Active Server Pages; ASP in Delphi; Creating ASP DLLs; Web applications; World wide web, internet; Building ASP objects; Personal Web Server; Assigning TCP/IP addresses; ASP type library; IScriptingContext; IResponse; Databases and ASP; TDataSetTableProducer; Generating HTML

One Last Compile...
Authors			Type: Article
Issue	42 : February 1999	View article	No source code
Summary	Portrait of the Artist as a Young Coder
Keywords	One Last Compile...

Update: Diagramming In Delphi, Part 2
Authors	Jim Cooper		Type: Article
Issue	42 : February 1999	View article	View source code
Summary	Jim Cooper fixes a glitch in the second instalment of his diagramming article, from the January 1999 issue
Keywords	Diagramming in Delphi; Issue 41 update; Drawing

Beating the System: Animated Icons And Cursors, 2
Authors	Dave Jewell		Type: Article
Issue	42 : February 1999	View article	View source code
Summary	In this second part of his investigation of ANI files, Dave Jewell presents components to display an animation on a form and to use an animated icon in the Windows tray icon area
Keywords	Beating the System; Animated icons and cursors; Property editors; DSGNINTF unit; Component building; Registering property editors; Animated Windows tray icons; Windows taskbar; Shell_NotifyIcon; Window handle with no window; AllocateHWnd; Hidden windows; DeallocateHWnd; Animated cursors; LoadImage

Paradox File Corruption
Authors	Brian Long		Type: Article
Issue	42 : February 1999	View article	View source code
Summary	It seems that corruption of Paradox table and index files is still rife, but Brian Long has been searching high and low for the information you need to avoid such problems. He's also created a handy utility which will investigate the various relevant system settings on a machine and alert you to any issues
Keywords	Paradox file corruption; Paradox index corruption; Paradox table corruption; BDE; Database file corruption; Session.PrivateDir; Lock file has grown too big; Paradox temporary files; Local Share; Packing Paradox tables; Disk caching problems; dBase file corruption; VREDIR.VXD; VNETSUP.VXD; Data sharing with NT Server; Windows 95 and NT Server; Write-behind caching; Synchronous buffer commits; File locking semantics; AsyncFileCommit; SoftCompatMode; Novell netware networks; Opportunistic locking; ForceLazyOff; SmartDrive; RestartDialog; CheckRegistryEntry; TUtility

Algorithms Alfresco: Back On The Chain Gang
Authors	Julian Bucknall		Type: Article
Issue	42 : February 1999	View article	View source code
Summary	Julian Bucknall opens the can on linked lists. So you think you know all about these ubiquitous data structures? Well think again, as Julian has some neat tricks up his sleeve to make life easier and your applications faster!
Keywords	Algorithms Alfresco; Linked lists; Container data structure; TList; Singly linked list; Doubly linked list; Array versus linked list; Nodes; EZDSL class library; Typeless pointer; Allocating memory; Delphi heap manager; Memory management; Free list structure; Cursor in linked list; Sorting a linked list; Sorting singly linked list; Sorted list; Insertion sort; Binary search; Searching linked list; Stack and queue; LIFO and FIFO; Enqueue and dequeue; Circular linked list; Multilist linked list; Hash tables

Under Construction: Usenet News Reading, 2
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	42 : February 1999	View article	View source code
Summary	Bob Swart continues his work with the Network News Transfer Protocol (NNTP), showing how to write code that posts messages to Usenet newsgroups
Keywords	Under Construction; Usenet newsgroups; NNTP; Posting messages; News server; Socket programming; Winsock; Response status codes

COM Corner: ActiveX Documents, Part 1
Authors	Steve Teixeira		Type: Article
Issue	42 : February 1999	View article	View source code
Summary	Another first for The Delphi Magazine! Steve Teixeira has unravelled the techniques you need to create ActiveX document servers in Delphi
Keywords	COM Corner; ActiveX document servers; OLE; Automation; OLE 2.0 Document Objects; ActiveX document interfaces; Delphi ActiveX framework DAX; Automation server; IPersistStorage; IPersistFile; IOleObject; IDataObject; IOleInPlaceObject; IOleInPlaceActiveObject; IOleDocument; IOleDocumentView; IOleCommandTarget; IPrint; Frames documents views; IOleInPlaceFrame; IOleInPlaceSite; IOleContainer; TActiveXControl; FOleInPlaceSite; ObjQueryInterface; IOleLink

SQL Query
Authors	Brian Long		Type: Clinic
Issue	42 : February 1999	View article	View source code
Summary	SQL Query
Keywords	SQL; SQL queries on two tables; Help with writing SQL; QBE; Translating QBE to SQL; Database desktop; Visual query builder; Generating SQL queries; SQL SELECT, COUNT, WHERE; TQuery; SQL Builder; SQL DISTINCT; BDE local SQL; SQL JOIN

Delphi 4 Docking
Authors	Brian Long		Type: Clinic
Issue	42 : February 1999	View article	View source code
Summary	Delphi 4 Docking
Keywords	Delphi 4 docking; Turn docking off; GetDockSiteAtPos; Dockable windows in IDE; GetKeyState

Delphi Hangs PC
Authors	Brian Long		Type: Clinic
Issue	42 : February 1999	View article	View source code
Summary	Delphi Hangs PC
Keywords	Delphi hangs the computer; Inastalling components; Delphi 3; Image list bugs; COMCTL32.DLL versions; Video card drivers; Graphics cards; TImageList; Delphi IDE; Woll2Woll; Diamond Stealth; Matrox; S3 graphics chip; Diamond Viper; Neo Magic; Windows 98

Delphi 4 Components
Authors	Brian Long		Type: Clinic
Issue	42 : February 1999	View article	View source code
Summary	Delphi 4 Components
Keywords	Delphi 4 component errors; Delphi 4 bugs; Method overloading; Function overloading; Registering components; Missing components; Components not installed; Name mangling; Register procedure

Delphi 4 Editor Enhancements
Authors	Brian Long		Type: Clinic
Issue	42 : February 1999	View article	View source code
Summary	Delphi 4 Editor Enhancements
Keywords	Delphi 4 editor enhancements; Delphi IDE; Code explorer; Class completion; Module navigation; Code browser; Tooltip symbol insight

Delphi 4 Code Insight Customisation
Authors	Brian Long		Type: Clinic
Issue	42 : February 1999	View article	View source code
Summary	Delphi 4 Code Insight Customisation
Keywords	Delphi 4 Code Insight; Customising code insight; Code completion; Delphi 4 IDE; Name sorting

Algorithms Alfresco: Follow Me, Follow You
Authors	Julian Bucknall		Type: Article
Issue	43 : March 1999	View article	View source code
Summary	Since it will soon be time for all those Spring lambs to begin cavorting all over the place, Julian Bucknall is developing skip lists this month... Good structures for storing sorted data, says the maestro!
Keywords	Algorithms Alfresco; Skip lists; Linked lists; Doubly linked list; William Pugh; Balanced trees; Sorted data structures; Probabilistic; Unbalanced binary tree; Balancing algorithms; Duplicate items in skip list; Deterministic skip lists; Munro, Papdakis, Sedgewick; 1-2 Skip list; Shuffle algorithm; Issue 40 update; Errata Issue 40; Memory management; Heap manager

Updating MakeMethodInstance
Authors	Peter Sokolov		Type: Article
Issue	43 : March 1999	View article	No source code
Summary	In Issue 18 John Chaytor described procedures for creating wrappers around class methods so they could be used as standard Windows callback procedures. Peter Sokolov has an update
Keywords	Issue 18 update; Issue 18 errata; Wrapper around class method; Class methods; Class methods as callbacks; Windows callbacks; Memory allocation; MEM_COMMIT; MEM_DECOMMIT; Reserving virtual memory; MEM_RESERVE; MEM_RELEASE; MakeMIC unit

Tooltips Under Your Control
Authors	Brian Long		Type: Article
Issue	43 : March 1999	View article	View source code
Summary	Brian Long has found some interesting and useful ways to customise Delphi's tooltips capability for use in your own applications: persistent hint windows, text completion tooltips and display improvements to string grids and other components
Keywords	Tooltips; Hints; Persistent hint windows; Customised tooltips; Customised hint windows; THintWindow; Tooltip symbol insight; Code parameters window; TTokenWindow; TPropertyHintWindow; Non-standard tooltips; Hint windows that stay open; HintWindowClass; CalcHintRect; Application.OnActivate; Application.OnDeActivate; SWP_NOACTIVATE; SetWindowPos and ShowWindow; StringGrid obscured cells; Partly obscured grid columns; Partly obscured grid cells; Hint shows full cell content; Hint window; TStringGrid; Text completion tooltips; MouseToCell; Find cell under mouse cursor; Mouse messages; Message handling; TDBGrid; MouseToCoord; Field under mouse cursor; TListBox obscured items; Item too wide for listbox; Display wide item in listbox; Hint window beeps; Click on hint window

Under Construction: Delphi 4 and CORBA
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	43 : March 1999	View article	View source code
Summary	Bob Swart introduces CORBA Server and Client development for Delphi programmers, with a handy application to retrieve newsgroup messages from behind your company's firewall!
Keywords	Under Construction; CORBA; Delphi 4; Client/Server; ORB and IIOP; IDL; Marshalling; Newsgroup CORBA server; NNTP newsgroup reader; TCorbaImplementation; Type library editor; Visibroker Smart Agent; CORBA development

DelayLoading of DLLs
Authors	Hallvard Vassbotn		Type: Article
Issue	43 : March 1999	View article	View source code
Summary	Hallvard Vassbotn takes an in-depth tour of the use of DLLs, implementing DelayLoading in Delphi. As seen first in Microsoft's Visual C++ 6.0, this allows your DLLs to be loaded only when the first DLL routine is called, as well as choosing between different DLL versions at runtime, conditional loading of feature-specific DLLs and more
Keywords	DelayLoading of DLLs; Microsoft Visual C++ 6.0; /DELAYLOAD option; DLL loading on demand; Implicit and explicit import; LoadLibrary; GetProcAddress; Writing and using DLLs; Thunking; External directive; Name directive; DLL routines case sensitive; Import by ordinal value; Import by name; Index directive; DLL import unit; Handling missing DLLs; DLL version problems; Routines missing from DLLs; Dynmic linking of DLLs; Generating code at runtime; Generating executable code; CPU instruction opcodes; Machine code; Bug in Delphi debugger; Integrated debugger bug; Breakpoint bugs; Using SizeOf in BASM; Built-In Assembler BASM; SizeOf always returns $34; Packages and performance; Packages and DLL calling; Allocating executable memory; PAGE_EXECUTE; PAGE_EXECUTE_READWRITE; VirtualProtect; GetMem; VirtualAlloc; Memory access rights; HeapCreate; HeapAlloc; HeapSize; HeapFree; HeapDestroy; Private memory heaps; Memory fragmentation; __fastcall convention; Peter Sawatzki

One Last Compile...
Authors			Type: Article
Issue	43 : March 1999	View article	No source code
Summary	Onwards and Upwards
Keywords	One last compile...

Delphi, Dates And The Year Two Thousand
Authors	David Sutherland		Type: Article
Issue	43 : March 1999	View article	No source code
Summary	David Sutherland reviews the origins of the so-called millennium bug, showing how it can affect more than you might think. He has strategies for overcoming date-related problems to ensure your systems are compliant
Keywords	Year 2000, Y2K; Millennium bug; Date handling; Year two thousand; Two-digit date data; Year 2000 compliance; Leap year; Inprise and Year 2000; Paradox and Year 2000; Interbase and Year 2000; dBase and Year 2000; Windows short date format; Windows date format; Regional settings; TDateTimePicker year 2000; ShortDateFormat; Four-digit year in Delphi; TwoDigitYearCenturyWindow; StrToDate, StrToDateTime; Adrock date classes; TAdrockDate component; Date arithmetic

Beating the System: Protecting Your Intellectual Property
Authors	Dave Jewell		Type: Article
Issue	43 : March 1999	View article	View source code
Summary	Dave Jewell discusses how to protect your trial components against the attentions of pirates and encourage users to register them. He has some clever little tricks up his sleeve...
Keywords	Beating the System; Code obfuscation; Protection from piracy; Detect Delphi running; Component trial versions; Shareware; Is Delphi IDE running; FindWindow; TAppBuilder; Finding running programs; Delphi IDE hidden windows; GetProcAddress; Parent process; ToolHelp unit; Process32First; Process32Next; Program launched from Delphi; GetCurrentProcessID; Windows NT PSAPI; IsDebuggerPresent

COM Corner: ActiveX Documents, Part 2
Authors	Steve Teixeira		Type: Article
Issue	43 : March 1999	View article	View source code
Summary	Steve Teixeira concludes his discussion of building ActiveX Document Servers.
Keywords	COM Corner; COM programming; ActiveX Document Server; Out of process server; In process server; InprocHandler32; CLSID; DocObject; Insertable key in ProgID; In process handler; DAX ActiveX framework; ActiveX Documents; IOleDocument; IOleDocumentView; InPlaceDeactivate; IOleInplaceObject; OnDocWindowActivate; InPlaceActivate; Overriding static methods; HTML OBJECT tag; Registering ActiveX server

Better Calculated Fields
Authors	Rohit Gupta		Type: Article
Issue	43 : March 1999	View article	View source code
Summary	Rohit Gupta describes how calculated fields should have been
Keywords	Calculated fields; Database applications; Interposer classes; Stephen Posey; Overriding routines; Enhanced calculated fields; Datachange event

Task Bar Calculations
Authors	Brian Long		Type: Clinic
Issue	43 : March 1999	View article	View source code
Summary	Task Bar Calculations
Keywords	Windows task bar; Is task bar present; Task bar location on screen; SystemParametersInfo; Monitor working area

IDE Dissatisfaction
Authors	Brian Long		Type: Clinic
Issue	43 : March 1999	View article	View source code
Summary	IDE Dissatisfaction
Keywords	Delphi IDE; Code completion window width; Tooltip delay time; DefHintHidePause; Tooltip pause; Application.HintHidePause

More On Property Editors
Authors	Brian Long		Type: Clinic
Issue	43 : March 1999	View article	View source code
Summary	More On Property Editors
Keywords	Property editors; DataField property; Custom property editor; Data-aware components

Delphi 4 Disservice
Authors	Brian Long		Type: Clinic
Issue	43 : March 1999	View article	View source code
Summary	Delphi 4 Disservice
Keywords	Delphi 4 and NT services; Start and stop an NT service; Windows NT; TServiceApplication; TService; Creating NT services; NT service not in IDE wizard; SVCMGR unit

Missing DBGrid Events
Authors	Brian Long		Type: Clinic
Issue	43 : March 1999	View article	View source code
Summary	Missing DBGrid Events
Keywords	TDBGrid; Column resize in DBGrid; Mouse dragging; Column resize events; FGridState; gsColResizing; CalcDrawInfo; CalcSizingState; dgIndicator current record

One Step ActiveX
Authors	Brian Long		Type: Clinic
Issue	43 : March 1999	View article	View source code
Summary	One Step ActiveX
Keywords	One step ActiveX; Creating ActiveX controls; Non-visual components; DAX; Convert component to ActiveX

Beating the System: Putting The Squeeze On
Authors	Dave Jewell		Type: Article
Issue	44 : April 1999	View article	View source code
Summary	Dave Jewell shows how vulnerable unprotected Delphi applications are to the attentions of hackers and describes techniques you can use to protect your software
Keywords	Beating the System; Protecting against hackers; Software security; Application security; Hacking; Reverse engineering; Merlin; Extracting resources; TImageList bug with Delphi 4; Create project from EXE file; Form files from EXE file; EXE2DPR utility; Protecting trial software; UpdateResource; LoadLibraryEx; EnumResourceNames; RT_RCDATA resource; stdcall with API enumeration; Callbacks; VCL callbacks; ObjectBinaryToText; EXE file compressors; Compressing executable files; ASPack; Shrinker; Petite; PkLite

An HTML File Reference Corrector
Authors	Paul Warren		Type: Article
Issue	44 : April 1999	View article	View source code
Summary	Paul Warren shows how to move a whole bunch of HTML files whilst keeping the relative links within them intact. As well as saving you hours of link-fixing, the article also covers a number of techniques which you can apply to many other projects too.
Keywords	HTML file references; Hyperlinks; HTML

Surviving Client/Server: Power SQL
Authors	Steve Troxell		Type: Article
Issue	44 : April 1999	View article	View source code
Summary	Lots of people think that SQL is only good for input/output work, simple joins and trivial calculations. When faced with some complex processing, they give up on SQL too quickly and code the task in Delphi instead. But, says Steve Troxell, with a little thought, SQL can do an amazing amount and give you shorter, more efficient code that's easier to debug!
Keywords	Surviving Client/Server; SQL; Program logic in SQL; SQL for data processing; Complex SQL; Effective date of data; DateAdd in SQL Server; Date arithmetic in SQL; SQL DECLARE CURSOR

Safer Sockets
Authors	Primoz Gabrijelcic		Type: Article
Issue	44 : April 1999	View article	View source code
Summary	Sockets make a frequent appearance in internet applications; Primoz Gabrijelcic outlines the problems he experienced with Delphi's TWinSocketStream class and details workarounds to get your projects moving again, including a new replacement class.
Keywords	TWinSocketStream bugs; Streams; Winsock programming; Sockets; ScktComp unit; TCP/IP; Slow and noisy modem lines; Buffer overwrite

One Last Compile
Authors			Type: Article
Issue	44 : April 1999	View article	No source code
Summary	Delphi and the Beautiful People
Keywords	One last compile...

Algorithms Alfresco: Knocked Down, Made Small
Authors	Julian Bucknall		Type: Article
Issue	44 : April 1999	View article	View source code
Summary	This month Julian Bucknall describes some data compression algorithms, including Huffman encoding.
Keywords	Algorithms Alfresco; Compression algorithms; Data compression; Huffman encoding; Huffman tree; Binary tree; Compress data stream

COM Corner: CoPourri
Authors	Steve Teixeira		Type: Article
Issue	44 : April 1999	View article	View source code
Summary	Steve Teixeira answers some readers' queries on COM progamming: adding COM interface types to the type library editor, exchanging binary data between an Automation client and server, and getting Automation server events to fire back to multiple clients.
Keywords	COM Corner; COM programming; Adding type definitions; Type library editor; Interface definition; Automation data exchange; Automation client and server; safearray; OleVariant; One object multiple clients; Surfacing events; Event handling in COM; TConnectionPoints.Kind; ckMulti; IConnectionPointContainer; RegisterActiveObject; GetActiveObject

Under Construction: Delphi 4 And Java
Authors	Bob Swart (aka Dr.Bob) , Hubert Klein Ikkink		Type: Article
Issue	44 : April 1999	View article	View source code
Summary	Bob Swart is joined by Java expert Hubert Klein Ikkink this month, together they connect a Java applet to a Delphi web server application.
Keywords	Under Construction; Java and Delphi; Socket programming; CGI programming; Java applet; Web-based To Do notes; Java to Delphi communication; Communication using sockets; TCP/IP; TServerSocket; stNonBlocking; stThreadBlocking; TClientSocket

A Delphi Singleton Class: Update
Authors	Marco Cant∙		Type: Article
Issue	44 : April 1999	View article	View source code
Summary	Marco Cant∙ and Hallvard Vassbotn have been discussing the best implementation of the Singleton pattern in Delphi between them, following Hallvard's article on the topic in the January 1999 issue.
Keywords	Design pattens; Singleton pattern; Hallvard Vassbotn

Bitmap Puzzle
Authors	Brian Long		Type: Clinic
Issue	44 : April 1999	View article	View source code
Summary	Bitmap Puzzle
Keywords	Bitmap buttons; Bitmaps for TBitBtn; Glyph properties; NumGlyphs; TBitmap.TransparentColor; Bitmap transparency

TTable Component Editor
Authors	Brian Long		Type: Clinic
Issue	44 : April 1999	View article	View source code
Summary	TTable Component Editor
Keywords	TTable component editor; Writing component editors; Adding component editors; TDefaultEditor; TDataSetEditor; DsgnIntf unit; GetComponentEditor

Treeviews And Tooltips
Authors	Brian Long		Type: Clinic
Issue	44 : April 1999	View article	View source code
Summary	Treeviews And Tooltips
Keywords	Treeviews and tooltips; Windows NT and treeviews; Turn off Treeview tooltips; COMCTL32; TVS_NOTOOLTIPS

Long And Short Filename Conversion
Authors	Brian Long		Type: Clinic
Issue	44 : April 1999	View article	View source code
Summary	Long And Short Filename Conversion
Keywords	Long and short filenames; Long to short filename; Short to long filename; ExtractShortPathName; GetShortPathName; TSearchRec

Internet Cookies
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	45 : May 1999	View article	View source code
Summary	Cookies are a good way of saving state in your web applications and Bob Swart shows how easy they are to implement, without any expensive add-on packs or Delphi's Client/Server version
Keywords	Internet cookies; Saving state; Web applications; Fat URLs; HTTP; CGI and ISAPI; CGI forms; Hidden fields in HTML forms; WebBroker; Persistent data in web apps; Web browser; Setting, retrieving cookies; Set-Cookie; HTTP header

Beating The System: Fun With Bitmaps
Authors	Dave Jewell		Type: Article
Issue	45 : May 1999	View article	View source code
Summary	Dave Jewell has been twiddling pixels: he shows how to manipulate bitmaps at the pixel level to create a variety of effects in double quick time, using the ScanLine property of Delphi's TCanvas class. Brightness changes, flipping and Gaussian blurs are amongst the facilities offered by our maestro.
Keywords	Beating the System; Bitmap manipulation; ScanLine property; Imaging toolkit; TCanvas.Pixels array; TBitmap.Scanline; PixelFormat; Bitmap brightness; Bitmap flipping; Gaussian blurs

DCOM Deployment Secrets
Authors	Roy Nelson		Type: Article
Issue	45 : May 1999	View article	View source code
Summary	Roy Nelson describes some common issues faced by developers in the deployment of DCOM applications, helping us avoid the usual pitfalls!
Keywords	DCOM deployment; E_NOINTERFACE error; Proxy and stub DLLs; CreateRemoteCOMObject; CoCreateInstanceEx; Deployment of DCOM clients; DCOM installation problems; QueryInterface; Registry settings; Type library; LoadTypeLibEx; Register DCOM server; Unregister DCOM server; DCOM out of process server

Algorithms Alfresco: Cherchez La Femme
Authors	Julian Bucknall		Type: Article
Issue	45 : May 1999	View article	View source code
Summary	Julian Bucknall takes the lid off Lempel and Ziv's LZ77 compression algorithm, saying hello to messrs Shannon, and Fano along the way, plus the PKZip Deflate method. The patent minefield introduced courtesy of Unisys is also outlined. Julian neatly sidesteps all these problems by creating our very own Algorithms Alfresco variant of LZ77, which is of course better!
Keywords	Algorithms Alfresco; Compression algorithms; LZ77 compression; Data compression; Shannon-Fanno; Lempel-Ziv; Software patents; Compression dictionary; Sliding window; PkZip; Deflate algorithm; Microsoft Expand; GIF compression; Unisys; LZW algorithm, LZ78; Circular queue; Hash table; Linked list

Under Construction: Delphi 4 And Java, Part 2
Authors	Bob Swart (aka Dr.Bob) , Hubert Klein Ikkink		Type: Article
Issue	45 : May 1999	View article	View source code
Summary	Bob Swart and Hubert Klein use CORBA to enable communication between Delphi and Java applications
Keywords	Under Construction; Delphi to Java communication; CORBA programming; Multi-tier applications; CORBA server; CORBA objects; Type libraries; Java, JBuilder; Diary application

Is Delphi Running?
Authors	Brian Long		Type: Article
Issue	45 : May 1999	View article	View source code
Summary	Often you want code to behave differently at design-time and runtime, or find out if Delphi is installed, running or launched your application. Brian Long explains all the tricks you need to know, covering all versions of Delphi.
Keywords	Is Delphi running?; Is Delphi IDE running?; Program launched by Delphi?; Trial software; Is Delphi installed?; Execution in Delphi IDE; Design time packages; csDesigning; ComponentState; Trial components; Register procedure; IDE versus application; Delphi launched the program; Delphi registry entries

Getting The Message
Authors	David Baer		Type: Article
Issue	45 : May 1999	View article	View source code
Summary	David Baer looks into the mysteries of Windows messaging and how it interacts with Delphi, presenting a very useful component which can be used to eavesdrop on Delphi internal message flows in a far more intimate way than external spy tools like WinSight32
Keywords	Windows message handling; Delphi and messages; Using Windows messages; SendMessage; Windows API; TControl.Perform; WndProc; Window handles; TObject.Dispatch; Windows messages explained; VCL messages; DoControlMsg; Message spy utility; Monitoring messages; CM_MOUSEENTER; CM_MOUSELEAVE; CM_FONTCHANGED; Hooking Windows messages; VMT

One Last Compile...
Authors			Type: Article
Issue	45 : May 1999	View article	No source code
Summary	Life, the universe and components.
Keywords	One last compile...

COM Corner: Microsoft Transaction Server, Part 1
Authors	Steve Teixeira		Type: Article
Issue	45 : May 1999	View article	No source code
Summary	and this month Steve Teixeira explains how it's really about much more than transactions. The COM-based MTS technology has been generating much interest lately
Keywords	COM Corner; COM programming; MTS; Microsoft Transaction Server; Scalable applications; Multi-tier systems; N-Tier systems; Stateful objects; Stateless objects; MTS packages; MTS security

Debugging Web Applications
Authors	Brandon Smith		Type: Article
Issue	45 : May 1999	View article	View source code
Summary	Brandon Smith reports some useful techniques for debugging ISAPI, ASP and similar web applications. His recent review of web app development tools for Delphi is on this month's disk too!
Keywords	Debugging web applications; Debugging ISAPI; Changing ISAPI and ASP DLLs; Restarting web server; Internet Information Service; NT Server 4 and IIS 4; Replacing loaded DLLs; Turning off IIS caching; In-memory caching

GUID Equality
Authors	Brian Long		Type: Clinic
Issue	45 : May 1999	View article	View source code
Summary	GUID Equality
Keywords	Are two GUIDs the same?; GUID equality; GUID is not a string

TStringLists And Files
Authors	Brian Long		Type: Clinic
Issue	45 : May 1999	View article	View source code
Summary	TStringLists And Files
Keywords	TStringLists and files; LoadFromFile; Character #0 is end of file

CORBA Limitation?
Authors	Brian Long		Type: Clinic
Issue	45 : May 1999	View article	View source code
Summary	CORBA Limitation?
Keywords	CORBA IDL and Delphi; Translating IDL to Delphi; Type library editor; Type library as Pascal; Skeleton and stub classes; CORBA server

CORBA And DUN
Authors	Brian Long		Type: Clinic
Issue	45 : May 1999	View article	View source code
Summary	CORBA And DUN
Keywords	CORBA and dial up networking; DUN; Windows AutoDial; TCP/IP

Paradox Update
Authors	Brian Long		Type: Clinic
Issue	45 : May 1999	View article	View source code
Summary	Paradox Update
Keywords	Paradox file corruption; See website for new version!

NT Service Wizard Update
Authors	Brian Long		Type: Clinic
Issue	45 : May 1999	View article	View source code
Summary	NT Service Wizard Update
Keywords

Long Filename Update
Authors	Brian Long		Type: Clinic
Issue	45 : May 1999	View article	View source code
Summary	Long Filename Update
Keywords	Long Filename Update; SHGetFileInfo; SHGFI_DISPLAYNAME

Update: Tooltips Under Your Control
Authors	Brian Long		Type: Clinic
Issue	45 : May 1999	View article	View source code
Summary	Update: Tooltips Under Your Control
Keywords	Tooltips update Issue 43; Tooltip on DBGrid memo field; Memo contents in tooltip

ActiveX Data Objects
Authors	Guy Smith-Ferrier		Type: Article
Issue	46 : June 1999	View article	View source code
Summary	Guy Smith-Ferrier describes Microsoft's new ADO technology for data access and shows how to use it in your Delphi applications. Powerful database access and, look Ma, no BDE!
Keywords	ActiveX Data Objects; ADO; Database access; BDE Borland Database Engine; IDAPI; OLE DB; ODBC; COM; DAO Data Access Objects; RDA Remote Data Access; Multi-tier applications; ADO Recordset; Early or late binding; Dispinterfaces; ADO and BDE equivalents; ADO Connections; ADO exception handling; EOLEException; OLE DB Provider; ADO transaction handling; ADO schema information; ADO connection pooling; Briefcase model; Recordset persistence; TClientDataset; ADO third party products; Cybermagic Adonis; Lectum ADOSolutio; Delphi 5; ADO installation

Algorithms Alfresco: Occupy Your Mind
Authors	Julian Bucknall		Type: Article
Issue	46 : June 1999	View article	View source code
Summary	Julian Bucknall shows how to efficiently parse algebraic expressions by converting them to reverse Polish notation (no, not by hand, silly!). He also reveals that even columnists fail on some projects ands cheats at his brother-in-law's homework too...
Keywords	Algorithms Alfresco; Expression parsing; Algebra; Reverse Polish Notation RPN; Expression evaluation; Recursive descent parser; Stack parser; Parentheses in algebra; Operator precedence; Recursion; Unary minus and subtraction; ObStack data structure; Storing objects; Efficient string stack; Efficient string storage; Permutations

A Delphi CGI File Uploader
Authors	Paul Warren		Type: Article
Issue	46 : June 1999	View article	View source code
Summary	Paul Warren explains how to implement multipart form encoding in your CGI applications as an alternative to URL encoding and shows how we can use it to upload files to a web server from CGI applications.
Keywords	CGI; Web applications; URL encoding; Multipart/form-data encoding; ENCTYPE; HTML forms; Uploading files with CGI; RFC 1867; Content-disposition; CGI unit; MIME, UU, Base64; Internet Explorer; Netscape Navigator 3

Beating the System: Deciphering The DCU, Part 1
Authors	Dave Jewell		Type: Article
Issue	46 : June 1999	View article	View source code
Summary	Dave Jewell starts unravelling the DCU compiled unit file format which is so crucial to Delphi's blazingly fast compilation speeds and gives us some pointers on how this knowledge can be used to good effect in your work.
Keywords	Beating the System; DCU file format; Delphi compiler and linker; Compiled unit files; Packages; Dissassembling; Kibbitz; DCU version information; DCU compile date and time; Scanline update; TRGBQuadArray; Greyscaling a bitmap; Bitmap filters; File searching

Under Construction: Nested Tables
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	46 : June 1999	View article	View source code
Summary	Bob Swart explains what TNestedTable is all about and how we can make use of it in multi-tier application development.
Keywords	Under Construction; Nested tables; TNestedTable; Database; Nested dataset; BDE; Oracle 8 nested detail set; Master-detail relationships; Multi-tier applications; Master-detail and multi-tier; N-Tier; Provider component; TClientDataSet; DCOM; DataSetField

Distributed Application Development With Packages
Authors	Brian Long		Type: Article
Issue	46 : June 1999	View article	View source code
Summary	Brian Long explains how Delphi's packages can do much more than you imagined: he shows how to create applications that you can enhance and upgrade simply by shipping extra packages, just like Delphi's IDE can be upgraded by adding in 'packaged' wizards, property editors and the like.
Keywords	Packages; Distributed applications; Application plug-in modules; Extending applications; Plug-ins; Dynamic package loading; Design-time packages; Runtime packages; Installing components; Wizards and experts; Property editors; Component editors; RegisterComponents; RegisterNoIcon; RegisterPropertyEditor; RegisterLibraryExpert; ExptIntf unit; Customising tooltips; THintWindow; THintWindowClass; Archaeopteryx in Delphi 4; Delphi add-in packages; Loading, unloading packages; Tracking objects by address; Tracking objects by group; FreeEditorGroup; CurrentGroup; UnRegisterExpertGroup; LoadPackage; GetPackageDescription; Packages versus DLLs; Partitioning applications; Locate routine in a package; Name mangling; GetPackageInfo; Extender packages; Abstract classes; Object browser

COM Corner: Microsoft Transaction Server, Part 2
Authors	Steve Teixeira		Type: Article
Issue	46 : June 1999	View article	View source code
Summary	Steve Teixeira completes his examination of using MTS in Delphi with a practical example for us to experiment with.
Keywords	COM Corner; COM p[rogramming; MTS; Microsoft Transaction Server; MTS example application; Building MTS objects; MTS object wizards; TMtsAutoObject; Creating MTS applications; MtsObj unit; TAutoObject; Mtx unit; IObjectContext methods; Stateless objects; Resource dispenser; Shared property manager; ISharedPropertyGroupManager; Security in MTS; Installing an MTS server; Transaction Server Explorer; Debugging MTS applications; MTS package guid

One Last Compile...
Authors			Type: Article
Issue	46 : June 1999	View article	No source code
Summary	The tangled web we weave
Keywords	One last compile...

VCL Tab Question
Authors	Brian Long		Type: Clinic
Issue	46 : June 1999	View article	View source code
Summary	VCL Tab Question
Keywords	HotTrack property; Tab caption font colour; Page controls; TPageControl

DLL Question
Authors	Brian Long		Type: Clinic
Issue	46 : June 1999	View article	View source code
Summary	DLL Question
Keywords	Using already loaded DLL; LoadLibrary; LoadLibraryEx; Inter-process communication; Shared memory; DLLs not globally available

Incomplete Free
Authors	Brian Long		Type: Clinic
Issue	46 : June 1999	View article	View source code
Summary	Incomplete Free
Keywords	Free method; Destroying objects; Set object variable to nil; Object references; Method types; Addresses and events; Object methods; Class methods; Event addresses

Active OLE Object
Authors	Brian Long		Type: Clinic
Issue	46 : June 1999	View article	View source code
Summary	Active OLE Object
Keywords	Active OLE object; CreateOleObject; GetActiveOleObject; EOleSysError; Calling automation server; OLE Automation; Single or multiple instance; RegisterActiveObject; Strong or weak registration; RevokeActiveObject; Cookie variable; CoLockObjectExternal; CoDisconnectObject; Automation server

20 Rules For OOP In Delphi
Authors	Marco Cant∙		Type: Article
Issue	47 : July 1999	View article	View source code
Summary	Marco Cant∙ suggests some simple rules for object oriented programming which will help you improve the structure of your applications and make them easier to both develop and maintain. Included are key recommendations on working with classes, components, forms, variables, properties and methods.
Keywords	Object Oriented Programming; OOP; 20 rules for OOP; Program structure; Encapsulation; Forms classes not objects; Form classes; One class, one unit; Private and protected; Component naming; Event naming; Form methods; Custom form constructors; Global variables; Form1 and TForm1; Referring to global objects; Global form objects; Using form properties; Array properties; An OOP form wizard; Inheritance; Visual form inheritance; Using protected data; Designing methods

Beating The System: Deciphering The DCU, Part 2
Authors	Dave Jewell		Type: Article
Issue	47 : July 1999	View article	View source code
Summary	Dave Jewell continues his exploration of the DCU compiled unit file format which is so crucial to Delphi, this month unravelling more of the detailed record structures, discussing the numeric encoding scheme used and providing a framework for further research.
Keywords	Beating the System; DCU file format; Compiled unit file DCU; Delphi compiler and linker; Include files $I directive; Object files; Resource files; Compiler timestamp data; Unit modification date/time; Numeric encoding in DCU; Encoding numbers; Free Pascal compiler; Pascal on Linux

A Web Server Text Difference Engine
Authors	Paul Warren		Type: Article
Issue	47 : July 1999	View article	View source code
Summary	Paul Warren builds on last month's CGI file uploader using multipart form encoding to create a web-server-based text file difference engine.
Keywords	Text file difference engine; Web applications; CGI applications; Comparing text files; CGI component; CGI file uploads; Multiple file uploading; World wide web, internet

Algorithms Alfresco: Date Stamp
Authors	Julian Bucknall		Type: Article
Issue	47 : July 1999	View article	View source code
Summary	Julian Bucknall shows us easy and efficient ways to work with business dates, including business date arithmetic, with positively no Y2K problems!
Keywords	Algorithms Alfresco; Business dates; Date arithmetic; Working days; TDateTime problems; Delphi 1 TDateTime; Gregorian dates; Leap year calculation; Date validation; EncodeDate; DecodeDate; Date encoding; Binary searching; For loop gotcha; For loop counter undefined; Breaking out of a for loop; Interpolation search; Day of the week; DayOfWeek; ShortDayNames; LongDayNames

Under Construction: Creative Debugging Techniques
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	47 : July 1999	View article	View source code
Summary	Bob Swart explains the various debugging techniques available in Delphi, including remote debugging.
Keywords	Debugging techniques; Under Construction; Remote debugging; Integrated debugger; $L $D compiler directives; Local symbols; Turbo Debugger; Turbo Assembler; Host application; Debugging DLLs; IntraBob for debugging; Debugging CGI applications; Debugging ISAPI and NSAPI; Debugging distributed apps; Debugging ActiveForms; Debugging N-Tier apps; borrdbg.exe; Debug Server

One Last Compile...
Authors			Type: Article
Issue	47 : July 1999	View article	No source code
Summary	Ask not for whom the clock ticks
Keywords	One last compile...

Working With The InterBase API
Authors	Paul Reeves		Type: Article
Issue	47 : July 1999	View article	View source code
Summary	Paul Reeves explains how to get the best out of the InterBase DBMS by programming directly to its API in your Delphi applications, distilling some key information from the hundreds of pages in the C-oriented API handbook to help us understand how InterBase works and obtain useful performance gains.
Keywords	InterBase API; InterBase Express Components; Database server; DBMS; SQL database; gds32.dll; Network protocol; Transactions; Connecting to InterBase; Dynamic SQL; malloc() and ReallocMem; InterBase Result Set; Parameter blocks; InterBase error handling; Extended SQL descriptor area; XSQLDA

COM Corner: Language Support For COM
Authors	Steve Teixeira		Type: Article
Issue	47 : July 1999	View article	No source code
Summary	Steve Teixeira describes the support for COM programming built into the Delphi Object Pascal language, asking what does it mean to have these things built into the language, how do these features work, and what is the nature of their dependence on the COM APIs?
Keywords	COM Corner; COM programming; Language support for COM; Object Pascal and COM; Variants; TVarData; OleVariant; VARIANT struct; oleaut32.dll; Variant arrays; SAFEARRAYs; Late binding; Early binding; IDispatch; _DispInvoke; VarDispProc; ComObj unit; VarDispInvoke; WideString; UNICODE; AnsiString; BSTR string type; SysAllocStringLen; Interfaces; IUnknown; QueryInterface; Dispinterface

Invalid BLOb Handle
Authors	Brian Long		Type: Clinic
Issue	47 : July 1999	View article	View source code
Summary	Invalid BLOb Handle
Keywords	Invalid BLOb handle; BDE error 10030 ($272E); BDE caching of BLObs; BLOBS TO CACHE value; 64 BLObs limit

Object Etiquette
Authors	Brian Long		Type: Clinic
Issue	47 : July 1999	View article	View source code
Summary	Object Etiquette
Keywords	Set object reference to nil; Nil after free; Disposing of objects

Using Internet Explorer
Authors	Brian Long		Type: Clinic
Issue	47 : July 1999	View article	View source code
Summary	Using Internet Explorer
Keywords	Using Internet Explorer; Internet Explorer ActiveX; shdocvw.dll; Microsoft Internet Controls; Automation and Explorer; IWebBrowserApp; Internet Explorer via COM; Calling Internet Explorer

Temporary Internet Files
Authors	Brian Long		Type: Clinic
Issue	47 : July 1999	View article	View source code
Summary	Temporary Internet Files
Keywords	Temporary internet files; Internet Explorer; desktop.ini; index.dat; UICLSID; SHDOCVW.DLL; IShellFolder interface; SHGetSpecialFolderLocation; Access recycle bin; IShellDetails

XML: A Delphi Implementation
Authors	David Baer		Type: Article
Issue	48 : August 1999	View article	View source code
Summary	David Baer introduces XML: a new technology for inter-application communication on a grand scale, which is destined to become a very important part of many developers' lives. David explains the background and provides code to enable your applications to generate XML.
Keywords	XML; Inter-application comms; Extensible markup language; HTML; Data transfer; Internet; Document Type Definition DTD; XML parser; Internet Explorer 5; COM; XML entities; XML tags, elements; XML namespace; XML datatypes; PCDATA; CDATA; XML attributes; Generating XML in programs; Document Content Definition; DCD; XSchema; W3C; Document Object Model DOM; XML in Delphi; XML classes

Beating the System:Deciphering The DCU, Part 3
Authors	Dave Jewell		Type: Article
Issue	48 : August 1999	View article	View source code
Summary	Dave Jewell has the last instalment for now of his current mini-series on the DCU compiled unit file format, which this month expands the net to cover Delphi 3, 4 and 5 files!
Keywords	Beating the System; DCU compiled unit file; DCU file format; Delphi compiler; Delphi 5

Under Construction: Delphi Goes Dynamic
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	48 : August 1999	View article	View source code
Summary	Bob Swart discusses the dynamic creation of components and event handlers, with a fun little application to test out the techniques and keep your children amused too!
Keywords	Under Construction; Create components at runtime; Dynamic creation of events; Dynamic event handlers; Create event handlers; Dynamic components; Constructor; Create method

Algorithms Alfresco: Whirlpool
Authors	Julian Bucknall		Type: Article
Issue	48 : August 1999	View article	View source code
Summary	Julian Bucknall unravels CRC algorithms this month (that's Cyclic Redundancy Check in case you were wondering...): just the ticket for error checking on data transfers and a whole lot more.
Keywords	Algorithms Alfresco; CRC calculations; Cyclic Redundancy Check; Error checking; Checksum; Data transmission errors; Communications; Data compression; XMODEM; Hashing as a checksum; ELF Hash; Galois Field theory; CRC-16 and CRC-32; Modulo 2 arithmetic; Polynomial division; CRC-CCITT; AAL5 32-bit CRC

Delphi Memory Consumption
Authors	Brian Long		Type: Article
Issue	48 : August 1999	View article	View source code
Summary	Brian Long explains why Delphi applications can sometimes have a surprisingly large memory footprint, even with a tiny EXE file, and comes up with some clever ways to bring it back down to manageable proportions.
Keywords	Application memory use; Program memory use; Memory consumption; Show memory use in Delphi; -HM command line switch; OLE32.DLL and OLEAUT32.DLL; GetMem, AllocMem; GetProcessWorkingSetSize; VirtualQuery; Application working set size; GetSystemInfo; Committed memory; System.AllocMemCount; System.AllocMemSize; GetAllocMemCount; GetAllocMemSize; DelphiMM unit; FindCmdLineSwitch; Command line switches; -HV command line switch; Delphi heap error checking; GetHeapStatus; THeapStatus; Reducing memory use; Used DLLs; Remove DLL dependency; Registry; LoadResourceModule; Delayloading of DLLs; OLE Automation; VariantClear; Variants; System.VarClear

One Last Compile...
Authors			Type: Article
Issue	48 : August 1999	View article	No source code
Summary	I'll have Mr Forsyth's latest, please
Keywords	One last compile...

COM Corner: Top 10 ActiveForm Questions
Authors	Steve Teixeira		Type: Article
Issue	48 : August 1999	View article	View source code
Summary	Steve Teixeira sorts out your problems in developing and deploying ActiveForms, including: differences over ActiveX, design and security considerations, properties, web deployment, keystrokes, databases, working with the browser and using data files
Keywords	COM Corner; COM programming; ActiveForm development; ActiveForm and ActiveX; What are ActiveForms; TActiveFormControl; ActiveForm security; Using ActiveForms; Web-delivered ActiveForms; Deploying ActiveForms on web; Properties in ActiveForms; Required DLLs; IPersistPropertyBag; TActiveXControl; Keystroke handling; TranslateAccelerator; Databases and ActiveForms; Interfacing with web browser; HLinkNavigateString; HLinkGoForward; UrlMon unit; URLDownloadToFile; Open file in ActiveForm

Resource Strings And Internationalisation
Authors	Patrik Wang		Type: Article
Issue	48 : August 1999	View article	No source code
Summary	Patrik Wang explains how to use Delphi's resource string capabilities to provide simple and effective internationalisation for your applications, including translation of strings embedded in the VCL
Keywords	Resource strings; Internationalization; Internationalisation; Localisation; Localization; LoadString; Storing strings in resources; String constants

Explorer Dialog Problem
Authors	Brian Long		Type: Clinic
Issue	48 : August 1999	View article	View source code
Summary	Explorer Dialog Problem
Keywords	TOpenDialog; Hidden files in TOpenDialog; Windows Explorer

Home Grown SQL Monitor
Authors	Brian Long		Type: Clinic
Issue	48 : August 1999	View article	View source code
Summary	Home Grown SQL Monitor
Keywords	SQL Monitor; Monitoring SQL statements; Building an SQL monitor; SQL trace in applications; TBDECallback; Callbacks; cbTrace callback type; FSQLTraceCallback

Windows Miscellany
Authors	Brian Long		Type: Clinic
Issue	48 : August 1999	View article	View source code
Summary	Windows Miscellany
Keywords	Windows hints and tips; Windows shortcut keys; Windows key

Inprise/Borland Conference
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	49 : September 1999	View article	No source code
Summary	Bob Swart reports from the 10th Annual Borland Conference
Keywords	Borland Conference Report; Inprise Conference 1999

The Factory Pattern
Authors	Peter Hinrichsen		Type: Article
Issue	49 : September 1999	View article	View source code
Summary	Peter Hinrichsen describes a real-world example that demonstrates how the factory pattern can save you time and make your code more maintainable and extensible
Keywords	Factory pattern; Design patterns; Code maintainability; Code reuse; Creational pattern; Creating objects; Object of unknown class; Set object class at runtime; Selecting a report to run; Complex if then else; Complex if..tehn..else; Procedural programming; Class-reference types; Class of...; Call create; Inherited create; Poor man's singleton pattern; Abstract factory; Concrete factory

Algorithms Alfresco: Knock on Wood
Authors	Julian Bucknall		Type: Article
Issue	49 : September 1999	View article	View source code
Summary	Julian Bucknall runs through the basics of binary trees, in preparation for next month's Gold Issue Special on red-black binary trees. Fasten your seat belts.
Keywords	Algorithms Alfresco; Binary trees; Binary search trees; Linked list as a tree; Searching; Data structures; Stack class; Binary tree traversal; Balanced tree; Generating EPS files; Encapsulated PostScript; Writing PostScript

One Last Compile...
Authors			Type: Article
Issue	49 : September 1999	View article	No source code
Summary	Ladies and gentlemen, I present to you, in the blue corner: Delphi 5!
Keywords	One Last Compile...

A Better Build Process
Authors	Primoz Gabrijelcic		Type: Article
Issue	49 : September 1999	View article	View source code
Summary	Primoz Gabrijelcic has created a methodology and toolset to allow him to easily create debug and release builds of his application suites, with automated incrementing of version information too, all from the command line.
Keywords	Building a project; Command line utilities; Compiling in the IDE; Release and debug builds; Build process; Command line compiler; Version information; VERSION resource; DCC32.EXE; dcc32.cfg; Project configuration file; Project options settings; BRCC32.EXE; Resource compiler; Project settings file (.DOF); Batch files; Help compiler; Include file from help; Help project file (.hpj); EXE compresssor

Under Construction: Distributed Efficiency
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	49 : September 1999	View article	View source code
Summary	Bob Swart finds that for today's distributed applications optimisation means much more than speeding up a slow but frequently used routine. This month he shows how we can measure the amount of data transfer going on and then minimise it to improve response
Keywords	Under Construction; Optimisation and efficiency; Distributed applications; Minimising network traffic; Web applications; TClientDataSet; Distributed computing; TDataSetProvider; CORBA, COM, DCOM; OLEnterprise; Middleware; TDCOMConnection; Monitoring data transfer; Tuning; TClientDataSet.PackedRecords

Beating the System: When Worlds Collide
Authors	Dave Jewell		Type: Article
Issue	49 : September 1999	View article	View source code
Summary	Dave Jewell battles with Microsoft's common controls implementation: treeviews, toolbars, listviews and header controls
Keywords	Beating the System; Common controls DLL; COMCTL32.DLL; TTreeView; TToolbar; TListView; Delphi 5 and common controls; Custom draw; Owner draw problems; THeaderControl; hsOwnerDraw; OnDrawSection; Outlook Express style; OnCustomDraw; OnAdvancedCustomDraw; NM_CUSTOMDRAW; WM_DRAWITEM; LBS_OWNERDRAW

Porting KillerApp
Authors	Andrew McLellan		Type: Article
Issue	49 : September 1999	View article	No source code
Summary	The time has come for you to port your applications to Delphi 5. But don't despair, Andrew McLellan has been through the version upgrade pain many times before and has just the right procedure for you to follow.
Keywords	Porting to Delphi 5; Porting apps to new version; Upgrading to Delphi 5; Compatibility issues

ADO Support In Delphi 5
Authors	Guy Smith-Ferrier		Type: Article
Issue	49 : September 1999	View article	No source code
Summary	Guy Smith-Ferrier explains the support for ActiveX Data Objects introduced in Delphi 5 and shows how to get the best from it, which tools support it and which don't, plus porting from the BDE.
Keywords	ADO in Delphi 5; ADO Express; ActiveX Data Objects; TADOTable; ConnectionString; Using ADO in Delphi 5; MDAC 2.1; ADO 2.1; MDAC SDK 2.0; Data Access Components; MDAC SDK 2.1 update; ADO version history; BDE versus ADO; TADOConnection; IsolationLevel; OLE DB providers; Data link files; OpenSchema; ADO transactions; ADO datasets; Utilities and tools for ADO; ADOX, ADOMD, JRO; ADO Multi-Dimensional; OLAP and ADO; Replication

COM Corner: Creating Office 2000 COM Add-Ins
Authors	Brian Long		Type: Article
Issue	49 : September 1999	View article	View source code
Summary	Steve Teixeira says Office add-ins are fun as well as providing an excellent way to integrate your application with Microsoft's suite.
Keywords	COM Corner; Office 2000 COM add-ins; Creating Office add-ins; Microsoft Office 2000; IDTExtensibility2; ConnectMode; OnConnection; OnDisconnection; OleVariant; safearray; Registering an Office add-in; MSADDNDR.TLB; Import tyle library; Events in Office add-ins; TAutoObjectFactory; Debugging COM add-ins

Character Manipulation
Authors	Brian Long		Type: Clinic
Issue	49 : September 1999	View article	View source code
Summary	Character Manipulation
Keywords	Character manipulation; Ord; Char; Get ANSI value of character

SQL Server Problem
Authors	Brian Long		Type: Clinic
Issue	49 : September 1999	View article	View source code
Summary	SQL Server Problem
Keywords	SQL Server login; Locale settings; Syntax error converting date

DCOM UI Problem
Authors	Brian Long		Type: Clinic
Issue	49 : September 1999	View article	View source code
Summary	DCOM UI Problem
Keywords	DCOM configuration; Restart Windows dialog; DCOMCNFG.EXE

Daylight Savings Changeover
Authors	Brian Long		Type: Clinic
Issue	49 : September 1999	View article	View source code
Summary	Daylight Savings Changeover
Keywords	Daylight savings changeover; When does clock change?; GetTimeZoneInformation; TTimeZoneInformation; Co-ordinated Universal Time; UTC time; TSystemTime; wDayOfWeek

Terminating Programs
Authors	Brian Long		Type: Clinic
Issue	49 : September 1999	View article	View source code
Summary	Terminating Programs
Keywords	Terminating programs; ShellExecute; FindWindow; PostQuitMessage; TerminateProcess; CreateProcess; ShellExecuteEx; WinExec; Running external program; Terminating external program; see_Mask_NoCloseProcess; fMask; hProcess; EnumThreadWindows; Getting a window handle; EnumWindows; GetWindowThreadProcessID; PROCESS_TERMINATE; WaitForSingleObject; SendMessageTimeout

Computer Name In Registry
Authors	Brian Long		Type: Clinic
Issue	49 : September 1999	View article	View source code
Summary	Computer Name In Registry
Keywords	Computer name in registry; Find computer name; TRegistry.RootKey; Windows NT

New Delphi 5 Features
Authors	Brian Long		Type: Clinic
Issue	49 : September 1999	View article	View source code
Summary	New Delphi 5 Features
Keywords	Delphi 5 features; DsgnIntf unit; Font names display; ImageIndex properties; Fontname properties; Automatic hotkeys; AutoHotKeys; RethinkHotKeys; MenuAnimation; Popup menu animation; AutoLineReduction; RethinkLines; GetOrdProp, SetOrdProp

Data-Aware HTML Controls, 1
Authors	Steve Troxell		Type: Article
Issue	50 : October 1999	View article	View source code
Summary	Steve Troxell has developed a really neat way to generate web pages with content driven from databases, using markup codes in HTML pages, so website designers with no programming or database skills can easily create database-driven websites.
Keywords	HTML; Web applications; Internet; SQL; Payroll and human resources; Data-aware HTML; Database web apps; Web page authoring; Markup languages; Application server; Templates; CGI; Parsing; Encapsulation; ASP, Java Server Pages; XML; Tags; XML parsers; CUEsoft XML parser; Document Object Model DOM; DOM class; Generating HTML; Hidden HTML fields

Under Construction: Delphi 5 InternetExpress
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	50 : October 1999	View article	No source code
Summary	Bob Swart describes Delphi 5's InternetExpress, which combines WebBroker and MIDAS technologies, producing HTML and XML for ultra-thin clients. And as it's Dr.Bob, you can be sure he explains it step by step.
Keywords	Under Construction; InternetExpress; Delphi 5; WebBroker; MIDAS; HTML; XML; 4-Tier applications; Stateless MIDAS; Middleware; Creating a MIDAS server; Remote data module; Data Module Designer; Master-detail relationship; DataSetProvider; Field Link Designer; WebConnection; XMLBroker; MidasPageProducer

Delphi Junction
Authors	David Baer		Type: Article
Issue	50 : October 1999	View article	No source code
Summary	A crossword puzzle from David Baer
Keywords	Delphi Junction crossword

Localising With Delphi 5
Authors	Marco Cant∙		Type: Article
Issue	50 : October 1999	View article	View source code
Summary	how we can make the most use of it. Marco Cant∙ unravels the localisation capability in Delphi 5 and explains
Keywords	Localising with Delphi 5; Localisation, localization; Localizing; Internationalisation; Integrated Translation ITE; Delphi 5; Resource DLL Wizard; Delphi Translation Pack; resourcestring; Translation Manager; Translation Repository; Translating strings; Todo list bug; Translating VCL strings; Dynamic language loading; RichEdit

Beating the System: Delphi Code Generation Hints
Authors	Dave Jewell		Type: Article
Issue	50 : October 1999	View article	No source code
Summary	Dave Jewell provides insights into how Delphi generates its code, with handy pointers on FOR loops, optimisation tips and syntactic short cuts.
Keywords	Code generation; FOR loops; Control variable undefined; FOR loop counter; Pascal language; Result variable; Function result; Break and goto; Optimisation; const qualifier; Functions and procedures; Passing strings; Stack frame; Reference counting; Free; Initialising variables; InitInstance; Object member fields; Showing modal forms

Win32 Inter-Process Communication
Authors	Brian Long		Type: Article
Issue	50 : October 1999	View article	View source code
Summary	Brian Long gives us a thorough tutorial on getting applications to talk to each other and exchange data, even over a network. Brian explains all those fiddly API calls, with easy-to-use code.
Keywords	Inter-process communication; IPC; Communicating between apps; Win32; 32-bit Windows; Windows messages; Message handling; Sending messages to apps; Window handle; WParam and LParam; PostMessage; SendMessage; Window procedure WndProc; Queued messages; Application.ProcessMessages; Message urgency; HWnd_Broadcast; Broadcasting messages; Send message to all windows; BroadcastSystemMessage; BroadcastSystemMessageA; RegisterWindowMessage; Registering custom messages; FindWindow; Finding window handle; Windows Atom; wm_CopyData message; Sending data with messages; TCopyDataStruct; Mailslots; Send message over a network; Mailslot server; Mailslot client; CreateMailslot; SetMailslotInfo; GetMailslotInfo; Writing to a mailslot; Anonymous pipes; Named pipes; CreatePipe; CreateNamedPipe; Named pipes Windows NT only; Memory mapped files; File mapping; File view; CreateFileMapping; Named shared memory; Mutex

Algorithms Alfresco: Red Alert
Authors	Julian Bucknall		Type: Article
Issue	50 : October 1999	View article	View source code
Summary	Julian Bucknall explains red-black binary trees: what they are, how to use them and what benefits they give.
Keywords	Algorithms Alfresco; Red-black binary trees; Data structures; Binary search trees; Balanced trees; Tree balancing algorithms; Splay tree; Zi-g-zag and zig-zig; AVL trees

XML: A Delphi Implementation, 2
Authors	David Baer		Type: Article
Issue	50 : October 1999	View article	View source code
Summary	David Baer continues his series on using XML in Delphi (continuing from the August issue). As promised, this time David shows how to hook up his XML classes to an XML parser.
Keywords	XML in Delphi; XML class framework; DCDs; DTDs; XML Data Reduced; XML schemas; XML parsers; Document object model, DOM; Simple API for XML, SAX; msxml.dll; Microsoft XML parser; UTF-8 encoding; Standalone XML; XML processing instruction; Tree view of XML

One Last Compile...
Authors			Type: Article
Issue	50 : October 1999	View article	No source code
Summary	An artist and his palette.
Keywords	One Last Compile...

Exceptional Stack Tracing
Authors	Hallvard Vassbotn		Type: Article
Issue	50 : October 1999	View article	View source code
Summary	Hallvard Vassbotn shows how to find what bug in your code causes those pesky exceptions: yes, even access violations. Why be content with an error address which refers to code buried deep in the VCL or RTL when you can get straight to the offending line!
Keywords	Stack tracer; Find causes of exceptions; Causes of access violations; Debugging; Exception stack tracing; Hook exception handling; Application.OnException; EAccessViolation; Hooking exceptions; Hardware exceptions; DL import address table, IAT; Executable file format; ImportDescriptor table; Thunking of system DLL; Windows 95; GetProcAddress; Kernel32.RaiseException; Stack frames; Runtime location information; RTLI; MAP files

COM Corner: New COM Features In Delphi 5
Authors	Steve Teixeira		Type: Article
Issue	50 : October 1999	View article	View source code
Summary	Steve Teixeira has all the information.
Keywords	COM Corner; COM programming; COM in Delphi 5; Active Server Objects; ASP Active Server Pages; VBScript and JScript; TASPObject; COM Server components; Microsoft Office; Automation with Office; Type library updates dialog; HResult in Delphi 4 and 5

Property Editor Question
Authors	Brian Long		Type: Clinic
Issue	50 : October 1999	View article	View source code
Summary	Property Editor Question
Keywords	Property editors; Class name of object; TPropertyEdit; GetComponent

Page Control Query
Authors	Brian Long		Type: Clinic
Issue	50 : October 1999	View article	View source code
Summary	Page Control Query
Keywords	Active tab in TPageControl; ActivePageIndex; ActivePage; TTabSheet

Customised Alias
Authors	Brian Long		Type: Clinic
Issue	50 : October 1999	View article	View source code
Summary	Customised Alias
Keywords	Customised Alias; Database alias at runtime

Customised Status Bar
Authors	Brian Long		Type: Clinic
Issue	50 : October 1999	View article	View source code
Summary	Customised Status Bar
Keywords	Status bar panel colour; TStatusPanel; psOwnerDraw; OnDrawPanel

COM Server Components
Authors	Brian Long		Type: Clinic
Issue	50 : October 1999	View article	View source code
Summary	COM Server Components
Keywords	Delphi 5 COM servers; COM server components

Fancy Font Dialog
Authors	Brian Long		Type: Clinic
Issue	50 : October 1999	View article	View source code
Summary	Fancy Font Dialog
Keywords	Custom font dialog; TFontDialog events

Multi-User Delphi Installation
Authors	Brian Long		Type: Clinic
Issue	50 : October 1999	View article	View source code
Summary	Multi-User Delphi Installation
Keywords	Multi-user Delphi install; User settings in registry; HKEY_CURRENT_USER

Components On The Clipboard
Authors	Brian Long		Type: Clinic
Issue	50 : October 1999	View article	View source code
Summary	Components On The Clipboard
Keywords	Components on clipboard; Clipboard.Setcomponent; Multiple components; Customs clipboard formats; Clipbrd unit; CF_COMPONENT; CF_COMPONENTS; TMemoryStream; Copy components on clipboard

Custom TLabel Component
Authors	Brian Long		Type: Clinic
Issue	50 : October 1999	View article	View source code
Summary	Custom TLabel Component
Keywords	Custom TLabel; OnMouseMove; Label changes mouse enters; cm_MouseEnter; cm_MouseLeave; Message handling; Hyperlink labels

User-Defined Exceptions
Authors	Brian Long		Type: Clinic
Issue	50 : October 1999	View article	View source code
Summary	User-Defined Exceptions
Keywords	User-defined exceptions; Exception class; Redefining Exception

More On Active OLE Object
Authors	Brian Long		Type: Clinic
Issue	50 : October 1999	View article	View source code
Summary	More On Active OLE Object
Keywords	Active OLE object; DCOM; NT Services; CreateRemoteCOMObject

Delphi 5 Easter Eggs
Authors	Brian Long		Type: Clinic
Issue	50 : October 1999	View article	View source code
Summary	Delphi 5 Easter Eggs
Keywords	Delphi 5 Easter Eggs

Safecall Defined
Authors	Brian Long		Type: Article
Issue	51 : November 1999	View article	View source code
Summary	Brian Long explains Delphi's safecall reserved word in depth, showing its work in handling exceptions in your COM and Automation applications
Keywords	SAFECALL; Exception handling; COM and Automation errors; Environment options dialog; Exceptions in DLLs; COM error objects; ICreateErrorInfo; STDCALL; ISupportErrorInfo; HResult; Type library; S_OK and E_UNEXPECTED; Accessing HResult; Hardware exceptions; Unexpected failure exception; Safecall function mapping; SafeCallException; HandleAutoException; SafeCallErrorProc; CheckAutoResult; SysUtils unit; Runtime error 229; IServerExceptionHandler; Error logging; Access violation

Beating The System: Taming the File System, 1
Authors	Dave Jewell		Type: Article
Issue	51 : November 1999	View article	View source code
Summary	Here's a shock: Dave Jewell is just a tiny bit jealous of Visual Basic programmers! The reason? The FSO (File System Library), which gives easy access to all kinds of information about the Windows file system. So this month he sets out to put matters right by building his very own 100% pure Delphi file system class
Keywords	Beating the System; File system class; FSO object model; File system library; Visual Basic; Microsoft Scripting Runtime; SCRRUN.DLL; TFileSystemObject; Drive types; Installed drives; Fixed and removable drives; Is drive ready; Disk space free; Disk size; GetDiskFreeSpaceEx; DiskFree; Drives over 2Gb size; Network drive disk quota; Drive available space; Disk volume name; FAT file system; Disk serial number

One Last Compile...
Authors			Type: Article
Issue	51 : November 1999	View article	No source code
Summary	If I had a hammer.
Keywords	One Last Compile...

Remote Monitoring
Authors	Paul Warren		Type: Article
Issue	51 : November 1999	View article	View source code
Summary	Paul Warren has found a neat way to monitor the output of an expensive instrument control and data acquisition package on an intranet, using a web technique called client pull
Keywords	Remote equipment monitoring; Instrument monitoring; Data acquisition; Web animation; Server push; Client pull; GetDC and GetWindowDC; Device context; Make bitmap of window; Convert bitmap to JPEG; FileWrite; Refresh HTML META tag; http-equiv; SetForegroundWindow; RedrawWindow

Under Construction: Delphi 5 InternetExpress, 2
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	51 : November 1999	View article	View source code
Summary	Bob Swart continues his exploration of Delphi 5's InternetExpress technology. This month, Bob discusses how to limit the amount of data being sent from the server to the browser, how to handle reconcile errors, and even how to use the technology without using a MIDAS licence
Keywords	Under Construction; InternetExpress Delphi 5; Optimisation; Reconcile errors; MIDAS; WebConnection; XMLBroker; MidasPageProducer; DataSetProvider; TSession.AutoSessionName; Multi-user database; ADO; Visual Data Module Designer; ADOTable; TClientDataset; MIDAS 3 is stateless; Limiting number of records; OnBeforeGetRecords; JavaScript; XML packets; OnBeforeScroll; Posting record edits; ApplyUpdates; Database update conflicts; Reconcile error dialog; HandleReconcileError; TReconcilePageProducer; MIDAS licensing

Delphi Junction: Solution
Authors	David Baer		Type: Article
Issue	51 : November 1999	View article	No source code
Summary	The solution to last month's crossword puzzle. See how you got on!
Keywords	Delphi Junction crossword; Crossword solutuion

Algorithms Alfresco: Re-Make, Re-Model
Authors	Julian Bucknall		Type: Article
Issue	51 : November 1999	View article	View source code
Summary	Julian Bucknall investigates Delphi's floating point support, with the full low-down on which floating point types to use, warnings on their limits of accuracy, and tips on how to dramatically improve the efficiency of your floating point calculations
Keywords	Algorithms Alfresco; Floating point variables; Floating point types; Efficiency and optimisation; real type; single type; double type; extended type; comp type; IEEE floating point types; FPU hardware; Floating point numbers; Floating point inaccuracy; Mantissa and Exponent; Exponent bias; Not a number; Typecast single as longint; absolute qualifier; Floating point optimisation; Optimization; Aligning doubles; Align to word boundary; Trunc and Round; Constant folding

The Observer Pattern
Authors	Peter Hinrichsen		Type: Article
Issue	51 : November 1999	View article	View source code
Summary	Peter Hinrichsen has more advice on making the most of design patterns in Delphi. This time round, he elucidates the observer pattern, whose intent is (to quote the Gang of Four): 'to define a one-to-many dependency between objects so that when one object changes state, all its dependants are notified and updated automatically'. Lots of practical real-world stuff here
Keywords	Observer pattern; Design patterns; Software design; Code reuse; Application framework; Object Oriented design; Business object model; UML; Singleton pattern; Push and pull observers

COM Corner: Efficient Variants
Authors	Steve Teixeira		Type: Article
Issue	51 : November 1999	View article	View source code
Summary	Steve Teixeira has been feeling sorry for the poor neglected Variant type. He feels it's got a bad press as being an inefficient way to do Automation. To set things straight he's come up with a great way to get efficient Variants, through the use of dispid caching. The result? Significant speed improvements.
Keywords	COM Corner; Efficient variants; Automation; COM programming; Variant type; Early and late binding; Interface and dispinterface; ID binding; IDispatch.Invoke; GetIDsOfNames; Caching Dispids; Cache; VarDispInvoke; VarDispProc; Optimisation

File I/O Error
Authors	Brian Long		Type: Clinic
Issue	51 : November 1999	View article	View source code
Summary	File I/O Error
Keywords	File i/o errors; Error 32; EInOutError.ErrorCode; ERROR_SHARING_VIOLATION; Error codes; SysErrorMessage

Type Library Corner Cutting
Authors	Brian Long		Type: Clinic
Issue	51 : November 1999	View article	View source code
Summary	Type Library Corner Cutting
Keywords	Type library corner cutting; Using type library; Registering a type library; Type library editor

Customised Docking
Authors	Brian Long		Type: Clinic
Issue	51 : November 1999	View article	View source code
Summary	Customised Docking
Keywords	Customised docking; ManualDock; UseDockManager; Grabber lines; TDockTree; AdjustDockRect; PaintDockFrame

CreateProcess Alert
Authors	Brian Long		Type: Clinic
Issue	51 : November 1999	View article	View source code
Summary	CreateProcess Alert
Keywords	CreateProcess resource leak; TProcessInformation; Reference counting; ShellExecuteEx; Launching an application; Run external program

Data-Aware HTML Controls, 2
Authors	Steve Troxell		Type: Article
Issue	52 : December 1999	View article	View source code
Summary	Steve Troxell concludes his two-part article on data-aware HTML controls: a neat and easy way to generate web pages with content driven from databases, using markup codes in HTML pages, so website designers with no programming or database skills can easily create database-driven websites.
Keywords	Web, internet; HTML; Active web pages; CGI applications; Web applications; Markup language engine; Data-driven web pages; Dynamic websites; XML parser; Data-aware HTML; Database; JavaScript; HTTP; COM object

Under Construction: Delphi 5 InternetExpress, 3
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	52 : December 1999	View article	No source code
Summary	Bob Swart continues his coverage of Delphi 5's InternetExpress, which combines WebBroker and MIDAS technologies, producing HTML and XML for ultra-thin clients.
Keywords	Under Construction; Delphi 5 InternetExpress; Web applications; Internet applications; World wide web; WebBroker, MIDAS, XML; HTML; Web Editor components; Custom components; Debugging InternetExpress; Master-detail relations; XMLBroker; Data-driven web apps; TADOTable; ADO; TADOConnection; Custom InternetExpress; MidasPageProducer; Missing data provider; XMLDataSetField bug; IntraBob 5.0; Web application debugging; ISAPI debugging; MIDAS licensing

TRichEdits And Embedded Objects
Authors	Brian Long		Type: Article
Issue	52 : December 1999	View article	View source code
Summary	Brian Long demonstrates how the standard Windows rich edit control, encapsulated in Delphi's TRichEdit component, can be used to display bitmaps through the wonders of OLE.
Keywords	TRichEdit; Embedding objects; Graphics in TRichEdits; Rich text; Bitmaps in rich text; OLE objects; IRichEditOLECallback; em_SetOleCallback; safecall and stdcall; TInterfacedObject; CreateIBytesOnHGlobal; StgCreateDocfileOnILockBytes; IStorage; IOleInPlaceFrame; OleCtnrs unit; TOleInPlaceFrameInfo; IVCLFrameForm; GetVCLFrameForm; OleFormObject; In-place editing; Editing OLE object

Beating the System: Taming The File System, 2
Authors	Dave Jewell		Type: Article
Issue	52 : December 1999	View article	View source code
Summary	Dave Jewell continues development of his own Delphi encapsulation of the file system: easy to use, deploy and extend in any way you like! This month he covers folder navigation, tree walking and more.
Keywords	Beating the System; File system class; Directory navigation; Folders and directories; Encapsulate file system; Relative pathnames; Check if directory exists; How to use FileClose; FileCtrl unit; Scanning directories; Walk directory tree; FindFirst and FindNext; faDirectory attribute; Archive attribute; Total size of directory tree; Sum file sizes

ADO Transaction Processing
Authors	Guy Smith-Ferrier		Type: Article
Issue	52 : December 1999	View article	View source code
Summary	Guy Smith-Ferrier unravels the intricacies of using ADO for transaction processing: comparing it to the Borland Database Engine's transaction support and covering topics such as nested transactions, cursors, transaction isolation levels and more.
Keywords	ADO transaction processing; ActiveX Data Objects; Database applications; TADOConnection; TDatabase for BDE; IDAPI; Transaction DDL property; Data definition language DDL; DML; Nested transactions; Fake nesting SQL Server 6.5; TXactAttributes; xaCommitRetaining; xaAbortRetaining; ADO datasets; Inner and outer transactions; Cursor types; Cursor locations; Lock types; CursorLocation; Client-side cursor; Server-side cursor; Client Cursor Library; CursorType; Transaction isolation; ilCursorStability; Dirty reads; Non-repeatable reads; Phantoms

Algorithms Alfresco: Hark the Herald Angels Sing
Authors	Julian Bucknall		Type: Article
Issue	52 : December 1999	View article	View source code
Summary	Julian Bucknall had a shock when flying back home to Colorado from DCon 99. He shares the results of a conversation with a strange bearded red-suited gentleman with us here, covering juicy little tidbits like bitsets, spell checkers, Soundex, long string gotchas and more.
Keywords	Algorithms Alfresco; Unique list of numbers; TList; Bit set, Bitset; Setting bits; Bitsets in database queying; Bitsets as indices, indexes; Long strings; Reference counting; Store long strings in TList; Pointers; How long strings work; Copy on write semantics; Typecasting; Random selection; Select 10 items from 100; Spell checker; Spelling check; Phonetic, Soundex; Sounds like; Phonetic dictionary; Hash tables; Binary search; ELF hash function

Serving Up The Registry
Authors	David Baer		Type: Article
Issue	52 : December 1999	View article	View source code
Summary	David Baer develops an easy-to-use Windows registry component, with insights into the registry and into component development. Features include easy saving and restoring of form size and location and, of course, minimal coding.
Keywords	Windows registry; Registry component; Registry access; TRegistry; Registry keys; Stoing form size, location; File history lists; Simple hex file viewer; Hexadecimal; Saving form location; Using TCollection; Aggregate properties; TCollectionItem

One Last Compile...
Authors			Type: Article
Issue	52 : December 1999	View article	No source code
Summary	Nothing was stirring, not even a wheely-mouse.
Keywords	One Last Compile...

COM Corner: An Introduction to COM+
Authors	Steve Teixeira		Type: Article
Issue	52 : December 1999	View article	No source code
Summary	Steve Teixeira brings us a foretaste of how COM will look in Windows 2000.
Keywords	COM Corner; COM programming; COM+ Introduction; COM plus; Windows 2000; OLE 2.0; MTS; MSMQ; Microsoft Transaction Server; Microsoft Message Queue; COM+ services; COM+ transactions; DTC; COM+ security; Role-based security; Just-in-time activation, JIT; SetComplete, SetAbort; IObjectContext; SetDeactivateOnReturn; IContextState; Queued components; Object pooling; IObjectControl.CanBePooled; COM+ events; Connection points model; Per-method-level; Load balancing; In-memory database; TSPM; Registration database, RegDB; Neutral threading model; Thread neutral apartment TNA; Microsoft Management Console; MMC

TWebBrowser Documentation Problem
Authors	Brian Long		Type: Clinic
Issue	52 : December 1999	View article	View source code
Summary	TWebBrowser Documentation Problem
Keywords	TWebBrowser documentation; Postdata; ActiveX Internet Explorer; Create a web browser; Web browser ActiveX; BeforeNavigate2; Variant arrays; Web server application; OleVariant

Local Share Requirement
Authors	Brian Long		Type: Clinic
Issue	52 : December 1999	View article	View source code
Summary	Local Share Requirement
Keywords	Set Local Share in code; BDE; Paradox file corruption; Local Share and Paradox

Computer Picker
Authors	Brian Long		Type: Clinic
Issue	52 : December 1999	View article	View source code
Summary	Computer Picker
Keywords	Select computer on network; Computer name; Browse computer name; TDCOMConnection; DCOM; TSocketConnection; TComputerNameProperty; SHBrowseForFolder

Form Painting Puzzle
Authors	Brian Long		Type: Clinic
Issue	52 : December 1999	View article	View source code
Summary	Form Painting Puzzle
Keywords	Form painting; Event handlers; Application.ProcessMessages; Windows messages; Message handling; ProcessMessage; Message queue

Dual Processor Woes
Authors	Brian Long		Type: Clinic
Issue	52 : December 1999	View article	View source code
Summary	Dual Processor Woes
Keywords	Dual processor problems; Symmetric Multi-Processing; SMP; Multiple processors; Threading; String reference counting; Threading bugs; Debugging threading; Threading model

What? More Easter Eggs?
Authors	Brian Long		Type: Clinic
Issue	52 : December 1999	View article	View source code
Summary	What? More Easter Eggs?
Keywords	Easter Eggs in Delphi 5; Easter Eggs in C++Builder 4

Corrections
Authors	Brian Long		Type: Clinic
Issue	52 : December 1999	View article	View source code
Summary	Corrections
Keywords	TCustomLabel correction; Hyperlink label correction; Daylight savings correction

Data Modules: Friend Or Foe?
Authors	Guy Smith-Ferrier		Type: Article
Issue	53 : January 2000	View article	View source code
Summary	Guy Smith-Ferrier starts an occasional series of articles designed to address some more basic issues that maybe we all ought to know about but which somehow slipped through the net... This month, he discusses the pros and cons of Data Modules, along with common problems (and solutions!).
Keywords	Data modules; Database applications; Data module problems; Reusing data modules; MDI applications; Updating record pointers; Multiple data modules; AddDataModule; TDataModule; RemoveDataModule; Data module name; Chained data modules; Data modules in IDE; Unknown database error; Business logic; Reusing business rules

Algorithms Alfresco: Midnight Run
Authors	Julian Bucknall		Type: Article
Issue	53 : January 2000	View article	View source code
Summary	Julian Bucknall shows us how to go about solving unsolvable problems, using simulated annealing. Along the way he covers two classic computer science problems: the travelling salesman and the knapsack.
Keywords	Algorithms Alfresco; NP-complete problems; Simulated annealing; Polynomial time; Knapsack problem; Travelling salesman problem; Intractable problems; Unsolvable problems; Boltzmann distribution; Probability; Find highest hill

A Delphi Multicaster Class
Authors	Max Rahder		Type: Article
Issue	53 : January 2000	View article	View source code
Summary	A multicaster allows many objects to listen for and detect events. Max Rahder presents a Delphi implementation of a multicaster class.
Keywords	Multicaster class; Listen for events; Detect events; Event handling; Singlecaster; Multiple event handlers; Event notification; Method references; Broadcasting

Under Construction: Delphi 5 WebBroker Stuff
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	53 : January 2000	View article	View source code
Summary	Bob Swart discusses the enhancements made to the WebBroker framework in Delphi 5, with a very handy utility to implement and log rotating advertising banners on your website.
Keywords	Under Construction; WebBroker; Delphi 5; InternetExpress components; Web modules; HTTPApp unit changes; WebBroker unit; WebBroker problems; DB Web App Wizard; Rotating banners; Advertising banners; Bitmap image; Internet applications; Web applications; Internet ContentType; HTML; CGI, ISAPI; image/gif ContentType; Website redirection; MidasPageProducer; HTML editor; Checkbox component; WebDispatcher bug; WebBroker Delphi 5 bugs

The Observer Pattern Observed
Authors	Tomasz Stanczak		Type: Article
Issue	53 : January 2000	View article	View source code
Summary	Tomasz Stanczak has more insights into the observer pattern, based on experience with a large and complex real-life project.
Keywords	Obrserver pattern; Design patterns; Push and pull models

One Last Compile...
Authors			Type: Article
Issue	53 : January 2000	View article	No source code
Summary	Used and Abused
Keywords	One Last Compile

Beating the System: Windows 2000, Are You Getting Certified?
Authors	Dave Jewell		Type: Article
Issue	53 : January 2000	View article	No source code
Summary	Dave Jewell gives us the low-down on what we need to know about for Windows 2000 from a software development perspective.
Keywords	Beating the System; Windows 2000 API; Windows 2000 certification; Windows installer; MSI; Windows 2000 logo; Application migration; Registry; Migration DLL; MEI; Migration Extension; System File Protection SFP; PROTECTED_FILE_DATA; SfcIsFileProtected; OnNow and ACPI; Power management; SetThreadExecutionState; Operating systems

XML in Delphi, 3
Authors	David Baer		Type: Article
Issue	53 : January 2000	View article	View source code
Summary	David Baer is back with Part 3 of his popular series on using XML in Delphi.
Keywords	XML; XML class framework; Document Object Model DOM; DOM node type; MSXML DLL; Document fragment node type; XML data type conversions; ISO date and time; XML Data; XML patterns; Pattern specification MSXML; Extensible Stylesheet XSL; Pattern selection

COM Corner: CoPourri
Authors	Steve Teixeira		Type: Article
Issue	53 : January 2000	View article	View source code
Summary	This month, Steve Teixeira has answers to a selection of readers' questions on common COM programming problems.
Keywords	COM Corner; COM programming; Readers' questions; Is component in design mode; Is component in runtime mode; Design-time or runtime; ActiveX; IOleClientSite; IOleObject.GetClientSite; IAmbientDispatch; AxCtrls unit; UserMode for ActiveX; UserMode limitations; Multiple IDispatch interface; Early and late binding; Running Object Table ROT; GetActiveObject; RegisterClassObject; Registering with ROT

Update: Safecall Defined
Authors	Brian Long		Type: Article
Issue	53 : January 2000	View article	No source code
Summary	Brian Long has more information on the safecall directive.
Keywords	Update on safecall defined; Safecall directive; HResult return code; EOleSysError

QuickReport And Printers
Authors	Brian Long		Type: Clinic
Issue	53 : January 2000	View article	View source code
Summary	QuickReport And Printers
Keywords	QuickReport and printers; Selecting printer; TQuickRep.PrinterSettings; PrinterIndex

File Copying
Authors	Brian Long		Type: Clinic
Issue	53 : January 2000	View article	View source code
Summary	File Copying
Keywords	File copying; CopyFile; FMXUtils unit; File copy using streams; File copy animation dialog; Animated progress dialog; Select directory; SHBrowseForFolder; SHFILEOPSTRUCT; SHFileOperation; CopyFileEx; Callbacks

ActiveX Warning
Authors	Brian Long		Type: Clinic
Issue	53 : January 2000	View article	View source code
Summary	ActiveX Warning
Keywords	ActiveX security warning; Using ActiveX control on web; Signed ActiveX; InternetExplorer; Code signing; Authenticode; Verisign and GTE

Custom Error Strings From DLL Routines
Authors	Brian Long		Type: Clinic
Issue	53 : January 2000	View article	View source code
Summary	Custom Error Strings From DLL Routines
Keywords	Custom error strings in DLLs; Writing DLLs; GetLastError, SetLastError; SysErrorMessage; RaiseLastWin32Error; EWin32Error; Win32Check; Message-table resource; Resource DLL; Message Compiler utility; Message-table in DLL

Update To File I/O Error
Authors	Brian Long		Type: Clinic
Issue	53 : January 2000	View article	View source code
Summary	Update To File I/O Error
Keywords	Update to file i/o error; Windows error codes; Net help command

ADO Batch Updates
Authors	Guy Smith-Ferrier		Type: Article
Issue	54 : February 2000	View article	View source code
Summary	Guy Smith-Ferrier shows how ADO's batch updates compare to the BDE's capabilities, explaining how to use batch updates and how they form a pre-requisite for disconnected recordsets, single tier applications and Remote Data Services.
Keywords	ADO batch updates; BDE cached updates; BDE TClientDataset; Disconnected recordsets; Single tier applications; Remote Data Services; ADOExpress; TADODataset; UpdateBatch; LockType; ltBatchOptimistic lock type; CancelUpdates; CancelBatch; UpdateStatus; FilterGroup; Database update conflicts; upWhereChanged; Simultaneous updates; ADO Errors occurred; OnRecordChangeComplete; ADO master/detail; Data Shape Provider; ADO Auto-increment fields; Auto incremented; Access AutoNumber

Algorithms Alfresco: Private Eyes
Authors	Julian Bucknall		Type: Article
Issue	54 : February 2000	View article	View source code
Summary	So you want to be a spy? Julian Bucknall introduces encryption, its background and terminology, and then describes some of the classic encryption techniques.
Keywords	Algorithms Alfresco; Encryption; Cryptography; Cipher; Decryption; Plaintext and Ciphertext; Key or password; DES data encryption standard; Public key; Digital signature; Signed packages; Verisign; Cryptanalyst; Cryptanalysis; Substitution cipher; Caesar cipher; ROT13 cipher, Unix; Mono-alphabetic cipher; Vigenere cipher; Polyalphabetic substitution; Giovan Batista Belaso; XOR cipher; Windows CE ActiveSync; One time pad (one-time); Transposition cipher; ADFGVX cipher; ENIGMA machine; Rotor machine; Bletchley Park; Alan Turing; The Bombe

Under Construction: VisiBroker for Delphi 5
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	54 : February 2000	View article	View source code
Summary	Bob Swart discusses VisiBroker for Delphi 5.
Keywords	Under Construction; Visibroker for Delphi 5; CORBA; IDL; Type Library; IDL2Pas; Convert IDL to Pascal; Dynamic interface invocation; DII; Interface Repository; CORBA exceptions

Beating the System: Taming The File System, 3
Authors	Dave Jewell		Type: Article
Issue	54 : February 2000	View article	View source code
Summary	Dave Jewell continues building his Windows file system object, this month adding in support for file change notifications before calling it a day (for now).
Keywords	Beating the System; File system object; File system classes; Waking directory tree; FindNext infinite loop; FindFirst; File change notifications; ShChangeNotify; FindFirstChangeNotification; WM_FILESYSCHANGE; WaitForSingleObject; Notification of file change; WaitForMultipleObject; Threads; ReadDirectoryChangesW

One Last Compile...
Authors			Type: Article
Issue	54 : February 2000	View article	No source code
Summary	Cubes not quite to the rescue.
Keywords	One last compile

Patterns And Persistence
Authors	Peter Hinrichsen		Type: Article
Issue	54 : February 2000	View article	View source code
Summary	Peter Hinrichsen uses the visitor pattern to build a persistent framework for database applications without any data-aware controls, providing more power and flexibility than the BDE, with true database independence.
Keywords	Design patterns; Persistence framework; Data aware controls; Data-aware; Problems with data aware; Visitor pattern; Database applications; Business objects; Database engine independence; Iterator pattern; Factory pattern; SQL; Visitor manager pattern; Persistent objects; Database independence

COM Corner: COM+ Events
Authors	Steve Teixeira		Type: Article
Issue	54 : February 2000	View article	View source code
Summary	Steve Teixeira explains how events work in COM+, part of this month's release of Windows 2000, with its loosely coupled events model, and what this means for our own COM apps.
Keywords	COM Corner; COM+ events; Connection points; Polling versus events; Tightly coupled event system; Loosely coupled event system; TCE and LCE; Publishers and subscribers; Windows 2000; Event class server; Event filters; Subscriber server

Watching TDateTime Values
Authors	Brian Long		Type: Clinic
Issue	54 : February 2000	View article	View source code
Summary	Watching TDateTime Values
Keywords	TDAteTime debugging; TDateTime in watch list; Debugger; Watched variables

Executable File Differences
Authors	Brian Long		Type: Clinic
Issue	54 : February 2000	View article	View source code
Summary	Executable File Differences
Keywords	Executable file differences; Executable timestamp; Date/time stamps; Compiler created timestamps; TDump utility

Common Control Library Version Mismatch
Authors	Brian Long		Type: Clinic
Issue	54 : February 2000	View article	View source code
Summary	Common Control Library Version Mismatch
Keywords	Common control library; TListView checkboxes; COMCTL32.DLL

Dynamic Array Question
Authors	Brian Long		Type: Clinic
Issue	54 : February 2000	View article	View source code
Summary	Dynamic Array Question
Keywords	Dynamic arrays; Initialising dynamic arrays; FillChar

TImage.OnProgress Broken?
Authors	Brian Long		Type: Clinic
Issue	54 : February 2000	View article	View source code
Summary	TImage.OnProgress Broken?
Keywords	TImage.OnProgress; Progress bar; Image load progress

Custom Grid Drawing
Authors	Brian Long		Type: Clinic
Issue	54 : February 2000	View article	View source code
Summary	Custom Grid Drawing
Keywords	Custom grid drawing; Colouring a row in TDBGrid; OnDrawDataCell; DefaultDrawing; Customising grid display; Customising rows and columns; OnDrawColumnCell

Splat: Sound And Graphics With Delphi
Authors	Ray Lischner		Type: Article
Issue	55 : March 2000	View article	View source code
Summary	Ray Lischner provides an excellent tutorial on using sounds and graphics in Delphi, with a handy application your pre-school kids will just love!
Keywords	Sound and Graphics; Multimedia; Drawing shapes; Playing sounds; Keyboard and mouse events; Double buffered graphics; TImage; TApplicationEvents; Keyboard handling; WAV files, WAVE resources; Sound files; Including resource scripts; .RC files; $R compiler directive; Getting free WAV files; Sound effects; Windows resources; MMSystem.PlaySound; Snd_Async; Snd_Resource; TCanvas; Force window to foreground; Force window to top; IsDebuggerPresent; DebukHook; Recording sounds; Media control interface MCI

Under Construction: Internet Security
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	55 : March 2000	View article	View source code
Summary	Bob Swart has some important advice to help secure your data and your customers' data, covering security layers, firewalls, proxies and SSL. Plus, he has some useful code which allows you to create password-protected areas on websites.
Keywords	Under Construction; Internet Security; Firewalls; BlackICE Defender; Proxy server, proxies; httpsrvr.dll; TWebConnection; Secure Sockets Layer SSL; Secure HTTP, S-HTTP; HTTPS; Verisign and Thawte; Password-protected website; Password access; Protected web pages; HTTP headers; MIME-type; HTTP error 401 unauthorized; NPH- non protocol header; CGI applications; DrBobCGI unit; Base64 encoding; Base 64 encoding; WebBroker; InternetExpress; WebModules; TWebRequest.Authorization; WWWAuthenticate; Realm; ActiveX security issues

Beating the System: Wrapping The RAS Services API
Authors	Dave Jewell		Type: Article
Issue	55 : March 2000	View article	View source code
Summary	Dave Jewell has been delving into the cloudy waters of the Windows Remote Access Services API, which also serves as a timely tutorial on how to wrap an API set as a Delphi object, without getting any unpleasant surprises when moving your code to other platforms, and showing how to fail gracefully if a required API doesn't exist.
Keywords	Beating the System; RAS Services API; Remote Access Service; Windows 2000; How to wrap a Windows API; Wrapping an API; API wrappers; Dial-up networking DUN; RASAPI32.DLL; RNAPH.DLL; RAS phonebooks; Dial-up phonebook; Windows NT and RAS; Make New Connection wizard

Contain Yourself!
Authors	David Baer		Type: Article
Issue	55 : March 2000	View article	View source code
Summary	David Baer investigates the goodies to be found in Delphi 5's new container class unit, plus the enhancements made to TList, and the TInterfaceList introduced in Delphi 4. Finally, David presents a new flexibly-self-sorting container class of his own.
Keywords	Container classes Delphi 5; Enhanced TList; TInterfaceList; Self-sorting container class; TList.Extract; raise ... at address; Exception handling; TListNotification; TList.Notify; TList notifications; TList notify bugs; TStringListSortCompare; Sorting a StringList; TStringList.CustomSort; Classes unit; TThreadList; TClassList; TObjectList; TComponentList; Simple stacks and queues; TOrderedList; LIFO and FIFO; TQueue, TObjectQueue; RTTI

One Last Compile...
Authors			Type: Article
Issue	55 : March 2000	View article	No source code
Summary	Me, Bill and socks.
Keywords	One last compile...

Algorithms Alfresco: Happiness Is An Option
Authors	Julian Bucknall		Type: Article
Issue	55 : March 2000	View article	View source code
Summary	Julian Bucknall unwraps some common difficulties using multiple threads in your applications, covering critical sections, mutexes, semaphores and events, plus a solution to the readers/writers problem.
Keywords	Algorithms Alfresco; Multithreaded programming; Processes, threads; Race condition; Primary thread; Multiprocessor machines; Multiple processors; WaitForSingleObject; WaitForMultipleObjects; Synchronisation objects; Critical sections; EnterCriticalSection; LeaveCriticalSection; TRTLCriticalSection; TryEnterCriticalSection; Deadlock; Signalled handle; Unsignalled handle; Mutex; ReleaseMutex; CreateMutex; OpenMutex; CloseHandle; Semaphore; ReleaseSemaphore; CreateSemaphore; OpenSemaphore; Windows event objects; Win32Event; Auto reset event; Manual reset event; CreateEvent; OpenEvent; SetEvent; ResetEvent; PulseEvent; Readers/Writers problem; LockList and UnlockList; TThreadedList

Persistent Fields: Friend Or Foe?
Authors	Guy Smith-Ferrier		Type: Article
Issue	55 : March 2000	View article	View source code
Summary	Guy Smith-Ferrier gives us a thorough analysis of both the strengths and weaknesses of persistent fields, dispelling a myth or two along the way, with fresh information from Delphi 5.
Keywords	Persistent fields; Fields array of dataset; TField; FieldByName; Fields Editor; Syntax checking; Field properties and events; Data dictionary; Lookup fields; Calculated fields; Aggregate fields; OnCalcFields; SQL Join, equi-join; TTable and TQuery; TDBLookupComboBox; Drag and drop fields; Replacement fields editor; Dataset designer; TBDEDesigner; TCDSDesigner; TClientDataset; TDSDesigner; ADO Express; InterBase Express; Component editors; Type mismatch for field

COM Corner: COM+ Queued Components
Authors	Steve Teixeira		Type: Article
Issue	55 : March 2000	View article	View source code
Summary	Steve Teixeira outlines COM+ queued components. Included in Windows 2000 Server, and based on Microsoft Message Queue technology, queued components provide a means for COM+ clients to asynchronously invoke methods of COM+ server components. Steve reassures us that things are not as difficult as they sound...
Keywords	COM Corner; COM programming; COM+ queued components; Windows 2000; MSMQ; Microsoft message queue; COM+ server; Object briefcase; Recorder, listener, player; Scalability; Load scheduling

RTTI And Module Boundaries
Authors	Brian Long		Type: Clinic
Issue	55 : March 2000	View article	View source code
Summary	RTTI And Module Boundaries
Keywords	RTTI; Module boundaries; Is and as operators; Safe typecasting; reInvalidCast; Virtual method table VMT

Object Inspector Refuses To Make Event Handler
Authors	Brian Long		Type: Clinic
Issue	55 : March 2000	View article	View source code
Summary	Object Inspector Refuses To Make Event Handler
Keywords	Event handlers; Adding event handlers; TMethodProperty; Property editors; DsgnIntf unit

TStrings And Object Owners
Authors	Brian Long		Type: Clinic
Issue	55 : March 2000	View article	View source code
Summary	TStrings And Object Owners
Keywords	TStrings and object owners; TStringList; Object reference; What owns an object?; TStringList.Objects

ListView Checkbox Changes
Authors	Brian Long		Type: Clinic
Issue	55 : March 2000	View article	View source code
Summary	ListView Checkbox Changes
Keywords	ListView checkbox changes; TItemChange; TListView.OnChange; TListItem.Checked; OnChanging; OnSelectItem; CanChange

Visual Form Inheritance And Frames: Friend or Foe?
Authors	Guy Smith-Ferrier		Type: Article
Issue	56 : April 2000	View article	View source code
Summary	Guy Smith-Ferrier discusses the relative merits of visual form inheritance and frames, explaining how they work, their good and bad points, and recommending how we should use these facilities.
Keywords	Visual Form Inheritance VFI; Frames; Repository; Sub-forms; Enter moves between controls; KeyPreview; TComponent.Notification; TComponent.Loaded; csInheritable; VFI drawbacks; ComponentStyle; TNotebook; Frames drawbacks; Form components

Beating the System: Wrapping The RAS Services API, Part 2
Authors	Dave Jewell		Type: Article
Issue	56 : April 2000	View article	View source code
Summary	Dave Jewell enhances his wrapper for Windows' RAS services, with extra goodies for phonebook manipulation and more
Keywords	Beating The System; RAS Services; Phonebooks; Dial-up networking DUN; Windows 2000; Telephone API TAPI; RasGetCountryInfo; Country list dialing codes; Dial parameters; RAS connection manager; Connection notification; WaitForSingleObject; RASConnectionNotification; RASEnumConnections; RASGetConnectStatus

Splat: Part 2, Going International
Authors	Ray Lischner		Type: Article
Issue	56 : April 2000	View article	View source code
Summary	Ray Lischner continues his useful demonstration of using Delphi's sound and graphics facilities. This month he internationalises the sample application and shows how to compress sound resources to reduce the .EXE's footprint.
Keywords	Sound and graphics; Internationalisation; Internationalization; Compressing resources; ZLib compression; Multiple languages; Keystroke handling; Keyboard scan codes; Wndows code page; Virtual key code; Localisation, Localization; resourcestring; Convert numbers and strings; VAL and STR; Resource localization; FindResourceHInstance; Finding resource DLL handle; Recording sounds; Input Locales; Install keyboard layout; Control Panel; Keyboard applet; Unicode; ToUnicode Windows NT; WideString and AnsiString; Unicode TLabel TStaticText; CreateWindowW; Resource DLL Wizard; ELL; Windows metafiles; Drawing shapes; Enhanced metafiles; WAV resources; TCompressionStream; Keyboard state; Extended keys

Algorithms Alfresco: Hyperactive
Authors	Julian Bucknall		Type: Article
Issue	56 : April 2000	View article	View source code
Summary	Julian Bucknall has more multithreading insights, this time covering producers and consumers, with easy to follow examples to explain it all.
Keywords	Algorithms Alfresco; Multithreading; Data Producers and Consumers; Synchronisation objects; Readers and Writers; Semaphore; Queue; Thread-safe; Mutex; InterlockedDecrement

One Last Compile...
Authors			Type: Article
Issue	56 : April 2000	View article	No source code
Summary	The name's Delphi. Borland Delphi.
Keywords	One last compile...

Under Construction: CORBA Exceptions In Delphi
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	56 : April 2000	View article	View source code
Summary	Bob Swart explains how to handle CORBA-specific exceptions in Delphi using VisiBroker.
Keywords	Under Construction; CORBA exceptions; Password access update; HTTP 401 Unauthorized; WebBroker; Internet Explorer 5; WWW-Authenticate update; Catastrophic failure error; CORBA error handling; VisiBroker for Delphi; SystemException; C++Builder exceptions; VisiBroker 3.4 problems; IDL exception definition

Dragging And Dropping Part 1: VCL
Authors	Brian Long		Type: Article
Issue	56 : April 2000	View article	View source code
Summary	Brian Long begins a thorough discussion of how drag and drop works by running through the VCL's built-in support, with some clever enhancement ideas too
Keywords	Dragging and Dropping; Drag and Drop; VCL drag and drop support; Drag source; Drag target, drop target; Controls; cm_Drag message; DragMode; dmAutomatic; dmManual; BeginDrag; Mouse.DragThreshold; Mouse.DragImmediate; Accept dragged object; OnDragDrop; FindDragTarget; CancelDrag

COM Corner: COM+ Security
Authors	Steve Teixeira		Type: Article
Issue	56 : April 2000	View article	No source code
Summary	Steve Teixeira explains the security features in COM+ and how to put them to use in your own applications.
Keywords	COM Corner; COM+ Security; Role-based security; Component Services tool; Windows 2000; COM+ roles; Impersonation levels; Authentication level; DCOMCNFG; CoInitializeSecurity; CoSetProxyBlanket; Multi-tier performance COM+; Programmatic security; Declarative security; IsCallerInRole; IObjectContext

Memos And Scroll Bars
Authors	Brian Long		Type: Clinic
Issue	56 : April 2000	View article	View source code
Summary	Memos And Scroll Bars
Keywords	Memos and scroll bars; Automatic scroll bars TMemo; Scrollbars

MIDAS Delta Packets
Authors	Brian Long		Type: Clinic
Issue	56 : April 2000	View article	View source code
Summary	MIDAS Delta Packets
Keywords	MIDAS Delta packets; TClientDataset.Delta; Dataset changes; MIDAS licence fees; OleVariant; Data packet and delta packet; Reconcile, ApplyUpdates; OnUpdateData

Drawing On Status Bars
Authors	Brian Long		Type: Clinic
Issue	56 : April 2000	View article	View source code
Summary	Drawing On Status Bars
Keywords	Drawing on status bars; Customised status bars; Icons on status bar; Status panels on status bar; TStatusPanel; SimplePanel

Accessing Application Icons
Authors	Brian Long		Type: Clinic
Issue	56 : April 2000	View article	View source code
Summary	Accessing Application Icons
Keywords	Accessing application icons; SHGetFileInfo; SHFILEINFO record; Extract application icon; SHGFI_EXETYPE

COM RTL Support
Authors	Brian Long		Type: Clinic
Issue	56 : April 2000	View article	View source code
Summary	COM RTL Support
Keywords	COM RTL support; ProgID; Connect to Automation object; ClassID; IDispatch; CreateOleObject; GetActiveOleObject; Windows Running Object Table; ROT; OleCheck

Object Assignment
Authors	Brian Long		Type: Clinic
Issue	56 : April 2000	View article	View source code
Summary	Object Assignment
Keywords	Object assignment; Copying or assigning objects; Pointers; Object references; AssignTo

Object Property Assignment
Authors	Brian Long		Type: Clinic
Issue	56 : April 2000	View article	View source code
Summary	Object Property Assignment
Keywords	Object property assignment; Property assign or copy?

Dragging And Dropping Part 2: Enhanced VCL
Authors	Brian Long		Type: Article
Issue	57 : May 2000	View article	View source code
Summary	Brian Long continues his in-depth examination of drag and drop in Delphi applications. This month he moves on to custom drag objects.
Keywords	Drag and drop; Enhancing VCL drag and drop; Custom drag objects; Drag control objects; Complex OnDragOver; Complex OnDragDrop; TDragObject; TDragControlObject; Drag and dock; OnStartDrag; OnDragOver; OnDragDrop; IsDragObject; Custom drag cursor; GetDragCursor; GetDragImages; Merge image with drag cursor; crDrag and crNoDrop; Drag image list; ControlStyle problem; csDisplayDragImage; TDragImageList; Dragging and DLLs; Forms in DLLs; Drag and drop and DLLs

Correction: ADO Batch Updates
Authors	Guy Smith-Ferrier		Type: Article
Issue	57 : May 2000	View article	No source code
Summary	Guy Smith-Ferrier has some updated information concerning his article in Issue 54 (February 2000).
Keywords	ADO Batch Update correction; Issue 54 February 2000; BDE TUpdateMode; upWhereChanged; ADCPROP_UPDATECRITERIA_ENUM; Update Criteria; MDAC SDK 2.1

Beating the System: Alpha Blending In Windows 2000
Authors	Dave Jewell		Type: Article
Issue	57 : May 2000	View article	View source code
Summary	Dave Jewell has a flash of deja vu from the days of EGA video cards... and unveils the secrets of creating cute translucent effects in Windows 2000.
Keywords	Beating the System; Alpha blending; Windows 2000; Translucent windows; Transparent or translucent; SetWindowRGN; Apparent translucency; Non-rectangular windows; Layering; Window buffering; Flicker; Animation and layering; WS_EX_LAYERED; CreateParams; Window style bits; GetWindowLong; SetWindowLong; SetLayeredWindowAttributes; dwFlags; lwa_ColorKey; lwa_Alpha; bAlpha opactity level; crKey; Transparency by colour; Transparent colour; Shadowed windows; Window shadows; wm_WindowPosChanged; AnimateWindow; AW_HOR_POSITIVE; AW_VER_POSITIVE; Sliding windows; SystemParametersInfo; SPI_GetMenuAnimation; SPI_GetMenuFade; Animated menus; Sliding menus; Fading menus; UpdateLayeredWindow; Shrinker: problems?; Executable compressors; EXE compression

Life Without Data-Aware Controls
Authors	Philip Brown		Type: Article
Issue	57 : May 2000	View article	View source code
Summary	What's this? Heresy or the way we should all be working? Philip Brown presents the case for doing away with data-aware controls in our database applications, along with some ideas on how we can make life bearable without them.
Keywords	Data-aware controls; Data aware controls; No data-aware controls; Data-aware disadvantages; Decoupling; Separate logic and interface; Business rules; Application design; Application architecture; Visually representing sets; Data-aware grid problems; Transaction performance; Property sheets; Visual form inheritance; TTabSheet for Master-Detail; Grid versus ListView; Populating a ListView; BeginUpdate and EndUpdate

Under Construction: Delphi 5 And MIDAS 3
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	57 : May 2000	View article	View source code
Summary	Bob Swart discusses the new things to be found in MIDAS 3, including stateless remote data modules. He covers deployment issues and describes the best way to migrate your MIDAS 2 applications over to MIDAS 3. With the new (much) lower licence cost, MIDAS could now see far wider use by Delphi developers.
Keywords	Under Construction; MIDAS 3 and Delphi 5; Multi-tier applications; N-tier; Instancing and threading; Visual data module designer; MIDAS UpdateRegistry; TDataSetProvider; IProviderSupport; IAppServer; MIDAS server; Upgrade MIDAS 2 to MIDAS 3; SocketConnection; Socket Servers; NT Service; Stateless remote data module; Shared remote data modules; XMLBroker; GetXMLRecords; Maintaining state; Deploying MIDAS; MIDAS licensing

Effective Delphi Class Engineering 1: Crossing The Chasm
Authors	David Baer		Type: Article
Issue	57 : May 2000	View article	No source code
Summary	David Baer kicks off a new series of articles aimed at all of us who are reluctant, confused or ill-informed on what object-oriented development is all about. The goal is to demonstrate, clearly and without jargon-loaded obfuscation, how to design, create and use Delphi classes to make your development more productive.
Keywords	Delphi class engineering; Object oriented development; Class, component, object; Class design; VCL; Components or controls; Encapsulation; Inheritance; Polymorphism; Class member visibility; Private; Published; Protected; Public; Methods; OO design methods; Refactoring

Algorithms Alfresco: Push The Limits
Authors	Julian Bucknall		Type: Article
Issue	57 : May 2000	View article	View source code
Summary	Julian Bucknall has a collection of useful tips and tricks to give your applications that high performance edge.
Keywords	Algorithms Alfresco; Performance and optimisation; Optimization; Profilers; GetTickCount; Big-O notation (Big-Oh)); Sequential search; Binary search; Time efficiency; Space efficiency; Space/time trade-off; Long strings; String search and replace

Resolve That Date!
Authors	Martin Lanza		Type: Article
Issue	57 : May 2000	View article	View source code
Summary	Martin Lanza presents a handy routine to convert dates in just about any commonly used string format to Delphi's own TDateTime.
Keywords	Converting dates; Date in string format; TDateTime; Date string to TDateTime; StrToDate; Visual Basic DateValue

One Last Compile...
Authors			Type: Article
Issue	57 : May 2000	View article	No source code
Summary	Into the IUnknown
Keywords	One last compile

Where Is My Documents?
Authors	Brian Long		Type: Clinic
Issue	57 : May 2000	View article	View source code
Summary	Where Is My Documents?
Keywords	My Documents folder; Shell API; Finding My Documents; SHGetSpecialFolderLocation; SHGetPathFromIDList; CSISDL_PERSONAL

Getting UNC File Names
Authors	Brian Long		Type: Clinic
Issue	57 : May 2000	View article	View source code
Summary	Getting UNC File Names
Keywords	Getting UNC filenames; Translate filename to UNC; ExpandUNCFilename; GetComputerName

Adding Tool Buttons
Authors	Brian Long		Type: Clinic
Issue	57 : May 2000	View article	View source code
Summary	Adding Tool Buttons
Keywords	Add button to TToolBar; SetToolBar; Customising a toolbar; TToolButton

Modifying The VCL Source
Authors	Brian Long		Type: Clinic
Issue	57 : May 2000	View article	View source code
Summary	Modifying The VCL Source
Keywords	TMaskEdit bug; Modifying VCL source; Recompiling the VCL

COM Terminology Problem
Authors	Brian Long		Type: Clinic
Issue	57 : May 2000	View article	View source code
Summary	COM Terminology Problem
Keywords	TClientDataset; DBCLIENT.DLL; In-process COM servers; DLLs and COM servers

Adding ActiveX/ ActiveForm Properties
Authors	Brian Long		Type: Clinic
Issue	57 : May 2000	View article	View source code
Summary	Adding ActiveX/ ActiveForm Properties
Keywords	Add properties to ActiveX; Add properties to ActiveForm; TActiveXControl; TActiveXControlFactory; TActiveFormFactory; ActiveXControlClass; WinControlClass; TActiveXFormControl; IPersistPropertyBag; IPersistStreamInit; IPersistStorage

Unhelpful Panel
Authors	Brian Long		Type: Clinic
Issue	57 : May 2000	View article	View source code
Summary	Unhelpful Panel
Keywords	Unhelpful panel; Panel HelpContext; WS_CLIPCHILDREN; WS_EX_CONTROLPARENT; Container control problems; Help for panels

Corrections
Authors	Brian Long		Type: Clinic
Issue	57 : May 2000	View article	View source code
Summary	Corrections
Keywords	Clinic Corrections; Issue 47 July 1999; $Hints directive; Issue 53; Authenticode

Easy Web Controls
Authors	Paul Warren		Type: Article
Issue	58 : June 2000	View article	View source code
Summary	Paul Warren has a really neat and easy way to generate and use visual web controls such as a calendar and charts in your web applications.
Keywords	Easy web controls; World wide web www; Web applications; Internet; WebModule; Visual components in web app; Web app calendar; Visual component WebModule; Control wrapper; Response.ContentStream; TWinControl.PaintTo; Copy control to bitmap; Bitmap image of control; Printing a component; GetContentAsStream; Calendar component; Rotatable label; IntersectClipRect; Web chart control; WebBroker; TPageProducer

Under Construction: Delphi 5 Active Server Objects
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	58 : June 2000	View article	View source code
Summary	Bob Swart describes how easy it is to create and use Active Server Objects in Delphi 5 that can be used in web (or intranet) pages created using Microsoft's Active Server Pages scripting language.
Keywords	Under Construction; Active Server Objects; Writing ASP objects; Server-side scripting; Web applications; World wide web www; ASP scripting; ASP Object wizard; ActiveX library; CoClass Name; Instancing and threading; Page-level event methods; Object context and MTS; ASP Request; ASP Response; ASP Session; Type library; ciMultiInstance; ciSingleInstance; Deploying ASP Objects; Script, Execute attributes; IIS 4.0; ASP session information; ASP, CGI and ISAPI; State management; Cookies; ASP.DLL; Debugging ASP objects

ADOX Extensions For DDL And Security
Authors	Guy Smith-Ferrier		Type: Article
Issue	58 : June 2000	View article	View source code
Summary	Guy Smith-Ferrier returns to ADO this month to explain how to use ADOX: an additional set of interfaces for ADO that allow us to handle the creation, maintenance and security of databases from our applications.
Keywords	ADOX extensions to ADO; ADO security and DDO; SQL DDO and DCL; Database maintenance; Database security; Database creation; Data manipulation language; MDAC; ADOX type library; MSADOX.DLL; ADOX Catalog; Get_ActiveConnection; Set_ActiveConnection; CoCatalog; Create database ADO; Delete database ADO; _NewENum, IENumVariant; axPropWrite; Create table ADO; Autoincrement in ADO; Auto increment field; ParentCatalog; OLE DB providers; GetPermissions; SetPermissions

Beating The System: Groovy Group Boxes
Authors	Dave Jewell		Type: Article
Issue	58 : June 2000	View article	View source code
Summary	Dave Jewell creates an enhanced group box control which automatically enables and disables the child controls within it, ridding us of the burden of extra programming to grey-out and un-grey child controls each and every time. And Dave's control has more clever swings and bells too!
Keywords	Beating the System; Enhanced group box component; Disabled group box; Group box child controls; Disable child controls; Greying-out child controls; TGroupBox; Group box caption; Group box border; Rotated caption; TrueType fonts; Caption background; Graduated fill; CreateFontIndirect

One Last Compile...
Authors			Type: Article
Issue	58 : June 2000	View article	No source code
Summary	We should be so lucky, lucky, lucky, lucky.
Keywords	One last compile

Dragging And Dropping Part 3: Windows
Authors	Brian Long		Type: Article
Issue	58 : June 2000	View article	View source code
Summary	Brian Long has the third part of his in-depth examination of drag and drop in Delphi applications, describing inter-application drag and drop using the Windows API. In particular Brian shows how to make your Delphi application act as a recipient for information dragged from other Windows applications.
Keywords	Drag and drop; Inter-application; Receiving dragged data; Windows 3 drag and drop; DragAcceptFiles; wm_DropFiles; WParam, LParam; Drop structure; DROPFILES structure; DragQueryPoint; DragQueryFile; DragFinish; OleInitialize; OleUninitialize; RegisterDragDrop; RevokeDragDrop; IDropTarget; DragEnter; grfKeyState; DragOver; IDataObject; DragLeave; IAdviseSink; Drag and drop data formats; Drag and drop and clipboard; Woozle data format; FORMATETC, TFormatEtc; EnumFormatEtc; TClipFormat; Delphi 3 drag and drop; VCLComObject; Drag and drop storage medium; STGMEDIUM, TStgMedium; ReleaseStgMedium; GetDataAsText; Drag and drop data as text; CF_TEXT; GetDataAsRtf; Drag and drop data as RTF; CF_RTF; IRichEditOle; EM_GETOLEINTERFACE; CF_HDROP file list; CF_BITMAP, CF_PALETTE; Graphics unit; LoadFromClipboardFormat; CF_DIB; TBitMapFileHeader; CF_ENHMETAFILE; CopyEnhMetaFile; CF_METAFILEPICT; WMF files drag and drop; TMetaFilePict; GetMetaFileBitsEx; SetWinMetaFileBits; Get size of metafile; Drag and drop between apps; COM drag and drop

Algorithms Alfresco: Strictly Confidential
Authors	Julian Bucknall		Type: Article
Issue	58 : June 2000	View article	View source code
Summary	Julian Bucknall unravels the complexities of Data Encryption Standard (DES) encryption, showing how this widely-used private key encryption algorithm works and providing code to plug in and use.
Keywords	Algorithms Alfresco; Cryptography; DES encryption; Private key encryption; Symmetric encryption; Security; Data encryption standard; NSB, NIST; IBM Lucifer project; S-boxes; DES trapdoor; Advanced Encryption Standard; AES encryption; Block cypher; Brute force attack; DES encryption broken; E-boxes, S-boxes, P-boxes; Ciphertext stealing; Electronic codebook mode; ECB; Cipher block chaining mode; CBC; Weak keys, semi-weak keys; Triple-DES; DES-EEE3, DES-EDE3

COM Corner: More Callbacks
Authors	Steve Teixeira		Type: Article
Issue	58 : June 2000	View article	No source code
Summary	Steve Teixeira shows how to perform a simple interface-based callback from a COM server to a client.
Keywords	COM callbacks; COM Corner; COM programming; RPC_E_WRONG_THREAD; COM proxies; Apartments; Data marshalling; CoMarshalInterThread...; CoInitializeEx

Strings And Streams
Authors	Brian Long		Type: Clinic
Issue	58 : June 2000	View article	View source code
Summary	Strings And Streams
Keywords	Strings and streams; TFileStream and text file

Optimised Working Set
Authors	Brian Long		Type: Clinic
Issue	58 : June 2000	View article	View source code
Summary	Optimised Working Set
Keywords	Optimised working set; SetProcessWorkingSetSize; Minimise memory use; Windows NT

Copying Selected Text Between TRichEdit Controls
Authors	Brian Long		Type: Clinic
Issue	58 : June 2000	View article	View source code
Summary	Copying Selected Text Between TRichEdit Controls
Keywords	Copy between richedits; TRichEdit; Copying RTF text; Copying formatted text; IRichEditOleCallback; EM_SETOLECALLBACK; IRichEditOle; EM_GETOLEINTERFACE; GetClipboardData; ImportDataObject; IDataObject

Rich Text To Microsoft Word
Authors	Brian Long		Type: Clinic
Issue	58 : June 2000	View article	View source code
Summary	Rich Text To Microsoft Word
Keywords	Copy formatted text to Word; Copy RTF text to Word; TRichEdit to Word; OleIsCurrentClipboard

API problem
Authors	Brian Long		Type: Clinic
Issue	58 : June 2000	View article	View source code
Summary	API problem
Keywords	WaitForSingleObject; Process handle signalled; Calling Microsoft Paint; Calling Windows Explorer; File access monitor; Pbrush.exe and MSPaint.exe

ActiveForm Destruction
Authors	Brian Long		Type: Clinic
Issue	58 : June 2000	View article	View source code
Summary	ActiveForm Destruction
Keywords	ActiveForm destruction; Application.Terminated; List of ActiveForm events

Effective Delphi Class Engineering 2: Welcome To The Machine
Authors	David Baer		Type: Article
Issue	59 : July 2000	View article	No source code
Summary	David Baer continues his series on practical object orientation by putting Delphi's object machinery under a magnifying glass. He examines topics such as memory management, method calling, protocols and other compiler- related issues.
Keywords	Class engineering; How objects work; Compiler issues; Object oriented; Class design; Language Guide; Scope; Implementation and interface; Class declaration; Delphi units; Public, published, private; Constructors and destructors; Unit design; Forward declaration; Classes and units; Memory allocation and use; Form variable; Auto-create forms; Global variables; Heap and stack; Reference counted variables; Variable initialisation; Memory use for strings; Object reference variable; Designing constructors; Using Inherited Create; TThread and inherited create; Designing destructors; Using inherited Destroy; Free and Destroy; Testing for nil; Using Self; Class data member; Memory leaks; Benign leak; TObjectList; FreeAndNil; Set object reference to nil; Multiple constructors; Object replication; Copying objects

Under Construction: Delphi 5 Active Server Objects, 2
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	59 : July 2000	View article	View source code
Summary	Bob Swart completes his coverage of developing Active Server Objects by looking at the way in which WebBroker and InternetExpress can be used by an Active Server Object.
Keywords	Under Construction; Active Server Objects; ASP objects; Dynamic HTML; HTML forms, CGI forms; ASP request object; Forms, fat URL, cookies; IRequestDictionary; Password field in HTML form; POST and GET form methods; World wide web www; Web applications; WebBroker and ASP objects; InternetExpress and ASP; Debugging ASP objects; IntraBob; Multi-threading ASP objects; BDE session conflicts; AutoSessionName; TPageProducer; TDataSetPageProducer; HTMLDoc property; TQueryTableProducer; TCustomWebDispatcher; WebDispatcher; MidasPageProducer; XML from ASP objects; Generating XML; XMLBroker; IIS; MTS

Application Architecture
Authors	Max Rahder		Type: Article
Issue	59 : July 2000	View article	View source code
Summary	Architecture is a fascinating subject, thinks Max Rahder. An application architecture is an infrastructure of classes which makes it easier to extend and modify a program, by retaining core functionality in the architecture. Max discusses this topic using an example application. Dramatically reduced development and maintenance costs is the promise.
Keywords	Application architecture; Frames; Infrastructure; Application design; Abstract classes; Class methods; Overriding methods; Object oriented development; Entity forms; Business entity; Model-view approach; De-coupled user interface; Form inheritance; Frames versus components; Database primary key; Integer as primary key; Reference counting; Business object

One Last Compile...
Authors			Type: Article
Issue	59 : July 2000	View article	No source code
Summary	It works fine here
Keywords	One last compile

Algorithms Alfresco: Arrrgh Essay
Authors	Julian Bucknall		Type: Article
Issue	59 : July 2000	View article	View source code
Summary	Julian Bucknall bravely steps into the arena to explain how the RSA encryption algorithm works. RSA is an example of public key encryption: data are encrypted using a freely available public key but can only be decrypted using a secret key, known only to the recipient of the data.
Keywords	Algorithms Alfresco; RSA encryption; Public key encryption; Asymmetric encryption; Cryptography; Private and public keys; Exchanging keys; Public and secret keys; Modulo arithmetic; Binary square and multiply; Large powers; Prime numbers; Chinese remainder theorem; Leonard Euler; Pierre de Fermat; Wide word arithmetic; Large integer arithmetic; Fermat's Little Theorem; Probabilistic primality test; Carmichael numbers; Miller-Rabin algorithm; Multiplicative inverse; Euclid's extended algorithm

Enhanced TRichEdit Controls
Authors	Brian Long		Type: Article
Issue	59 : July 2000	View article	View source code
Summary	Ever wondered why you can't put formatted text into a TRichEdit control at design-time using the property editor? Brian Long explains the reasons and develops an enhanced version of the control which answers this need.
Keywords	Enhanced RichEdit controls; TRichEdit; Loading text into TRichEdit; Load RTF into RichEdit; Rich text; Formatted text into RichEdit; Store RTF text in form file; RTF as custom resource; TRichEditStrings; TRichEdit.Lines property; Fake properties; Component streaming; DefineProperties; TFiler; RecreateWnd; DestroyWnd; CreateWnd; Visual form inheritance VFI; VFI and components; Property editor; Binding RTF file into EXE; Resource files .RES; Resource scripts .RC; Resource compiler; $R directive; TResourceStream; List of RTF solutions

Beating The System: TAR-geting Linux
Authors	Dave Jewell		Type: Article
Issue	59 : July 2000	View article	View source code
Summary	Dave Jewell's pun-making machine is in full swing this month as he provides a useful introduction to getting your code ready for Kylix (codename for Borland's eagerly-awaited Delphi for Linux) by way of a cross-platform TAR file utility.
Keywords	Beating the System; Linux; TAR files; Unix; Cross-platform development; Conditional compilation; CLX; Delphi 6; Kylix: Delphi for Linux; QaPainter; Qt for Windows; Linux file system; Case-sensitive filenames; Archive files; Mutliple file archive; GZip and Tar; Coordinated Universal Time; Convert Octal to Integer; OctalToInt; Octal string; Linux file permissions

IBSec: Securing InterBase Network Traffic On The Fly
Authors	Jani Jarvinen		Type: Article
Issue	59 : July 2000	View article	View source code
Summary	Jani JΣrvinen thinks InterBase is a great DBMS, but it has one flaw: all the data passing between server and client is open for all the world to see (not so good on the internet, for example). To overcome this he develops a utility which seamlessly encrypts and decrypts all InterBase network traffic.
Keywords	InterBase security; Encrypting network traffic; Secure network traffic; Database security; Encryption; TCP/IP; Internet security; World wide web www; Web applications; IP address and port; TClientSocket; TServerSocket; WinSock API; InterBase on port 3050; Intercept TCP communication; Blocking or non-blocking; OnClientConnect; PostMessage; Custom message handlers; TThreadList; OnClientDisconnect; OnDisconnect; WSAECONNABORTED; Microsoft CryptoAPI; CAPI encryption; RC4 encryption; Streaming cypher; CryptCreateHash; CryptHashData; CryptDeriveKey; CryptEncrypt; CryptDecrypt; Encrypt with same data size

InterBase Express Problem
Authors	Brian Long		Type: Clinic
Issue	59 : July 2000	View article	View source code
Summary	InterBase Express Problem
Keywords	InterBase express login; OnLogin; LoginPrompt; LoginParams; IBX login bug; TIBDatabase; FHiddenPassword; HidePassword; IBX patch

Strings To Numbers
Authors	Brian Long		Type: Clinic
Issue	59 : July 2000	View article	View source code
Summary	Strings To Numbers
Keywords	Strings to numbers; Convert string to float; Convert string to integer; StrToFloat, StrToInt; Intercepting exceptions; IDE debugging; No exceptions in IDE; TextToFloat; Val

Typed Constants
Authors	Brian Long		Type: Clinic
Issue	59 : July 2000	View article	View source code
Summary	Typed Constants
Keywords	Typed constants; Pe-initialised variables; Initialised variables; Static variables; $J compiler directive; $WriteableConst directive

Editing ListView Items
Authors	Brian Long		Type: Clinic
Issue	59 : July 2000	View article	View source code
Summary	Editing ListView Items
Keywords	Editing ListView items; TListView; EditCaption; LVM_EDITLABEL

Date Comments
Authors	Brian Long		Type: Clinic
Issue	59 : July 2000	View article	View source code
Summary	Date Comments
Keywords	Code templates; Automatic comments; Generating date in IDE; delphi32.dci; Customising code templates

Persistent Runtime Column Data
Authors	Brian Long		Type: Clinic
Issue	59 : July 2000	View article	View source code
Summary	Persistent Runtime Column Data
Keywords	Persistent grid column data; Saving grid column layout; TDBGrid; Persistent runtime columns; TDBGrid.Columns.SaveToFile; Streams

Delphi Grammar Problem
Authors	Brian Long		Type: Clinic
Issue	59 : July 2000	View article	View source code
Summary	Delphi Grammar Problem
Keywords	CreateProcess; WaitForSingleObject; WAIT_OBJECT_0; WAIT_TIMEOUT; Waiting for a process to end

Memos And BLOb Fields
Authors	Brian Long		Type: Clinic
Issue	59 : July 2000	View article	View source code
Summary	Memos And BLOb Fields
Keywords	Memos and BLOb fields; Binary large object; Paradox BLOb fields; FieldValues; TBlobStream

Multi-Threading And COM
Authors	Brian Long		Type: Article
Issue	60 : August 2000	View article	View source code
Summary	COM can do a lot for you, but finding out how to create multi-threaded COM apps is not easy. Brian Long helps us understand the concepts, terminology and issues involved in multi-threaded COM programming.
Keywords	COM multi-threading; Multi-threaded applications; Multiple threads; COM programming; Apartments; Process identifier; Process handle; VCL not thread-safe; Synchronize; Single-threaded apartment; STA; Apartment-threaded model; Multi-threaded apartment; MTA; Free-threaded model; Thread-neutral apartment; TNA; COM+ Windows 2000; Threading model; Thread local storage TLS; ComObj, ComServ units; Initialising COM; Proxy object; PostThreadMessage; Message loop, message pump; OleMainThreadWndClass; OleMainThreadWndName; RPC thread pool; Threadvar; Thread affinity; Critical section; Mutex; Semaphore; Choosing apartment type; OleInitialize; CoInitialize; CoInitializeEx; COINIT_APARTMENTTHREADED; COINIT_MULTITHREADED; In-process COM server; Out-of-process COM server; RPC_E_CHANGED_MODE; ThreadingModel; Mixed-model process; CoInitFlags; COINIT_SPEED_OVER_MEMORY; Delphi 4 and CoInitFlags; COM object wizard; RPC_E_WRONG_THREAD; COM errors; Marshaled; Marshaling interfaces; Marshalling; IGlobalInterfaceTable; RegisterInterfaceInGlobal; GetInterfaceFromGlobal; RevokeInterfaceFromGlobal; DCOM; Creating STAs; TComObjectFactory; TTypedComObjectFactory; TAutoObjectFactory; IClassFactory; _Release; InterlockedDecrement; Apartment interaction; Both-threading model; MTS, COM+, Windows 2000

Algorithms Alfresco: Dear Sir Or Madam
Authors	Julian Bucknall		Type: Article
Issue	60 : August 2000	View article	View source code
Summary	Julian Bucknall is in repentant mood and gets round to answering a pile of readers' emails, covering bugs and enhancements from previous columns.
Keywords	Algorithms Alfresco; Readers' emails and letters; Corrections; Issue 57 Algorithms Alfresco; Millennium bug; Issue 44 Algorithms Alfresco; Storing Huffman tree; Data compression; Writing out a tree; Rewading in a tree; Storing a binary tree; Recursion; Issue 46 Algorithms Alfresco; RPN expression parsing; Operator precedence; Equal precedence; Expression evaluation; Arithmetic expression; Reverse Polish notation; Memory overread; Issue 54 Algorithms Alfresco; Encryption; ENIGMA machine; Polish mathematicians; Rejewski; Cryptography; The Code Book, Simon Singh; Issue 42 Algorithms Alfresco; Linked lists; Double linked list; Records or objects; Linked list nodes; Linked list performance; Issue 51 Algorithms Alfresco; Floating point types; Data alignment; 8 byte alignment padding; Align to 8 byte boundaries; Double type; Delphi 5; Extended; Issue 50 Algorithms Alfresco; Red-black tree; Binary tree; Insert into red-black tree; Binary search tree; Balanced tree; Compiler options; $R, $Q, $X; Range checking; Overflow checking; Extended syntax; Choosing compiler options; Issue 53 Algorithms Alfresco; Simulated annealing; Competition

Effective Delphi Class Engineering 3: Skyrocketing Property
Authors	David Baer		Type: Article
Issue	60 : August 2000	View article	View source code
Summary	David Baer thinks properties are wonderful and this month gives us insights and advice on how they can best be put to use in our classes.
Keywords	Class engineering; Class design; Object oriented development; Properties; Class properties; Public class data members; Properties as arrays; Get and set functions; Read and write specifiers; Default specifier; Initialising properties; Read-only class data access; Write-only properties; Array properties; Parameterised properties; Value by name properties; Default properties; Stored specifier; Exceptions and properties; Property validation; Optimisation; Private properties; Indexed get and set methods; Property assignments

One Last Compile...
Authors			Type: Article
Issue	60 : August 2000	View article	No source code
Summary	The Parent Trap
Keywords	One last compile

Beating The System: Easy Internet, 1
Authors	Dave Jewell		Type: Article
Issue	60 : August 2000	View article	View source code
Summary	Dave Jewell has been delving into Microsoft's WinInet DLL, which serves as the foundation for much of the key functionality in Microsoft's internet applications such as Internet Explorer. Dave uses the fruits of his labours to construct an FTP site browser.
Keywords	Beating the System; WinInet.DLL; Internet applications; WinSock 2.0; TCP/IP; ws_32.dll; Internet Explorer; HTTP, FTP, Gopher; Delphi wrapper of WinINet; WinINet unit; InternetAutodial; Dialing internet connection; RAS dialup; Unattended dialup; Hanging up a connection; InternetAutodialHangup; InternetCheckConnection; InternetGoOnline; InternetGetConnectState; InternetOpen; Proxy server; lpszProxyByPass; Using local cache; Internet_Flag_From_Cache; HINTERNET session handle; Browse an ftp server; FTP on port 21; HTTP on port 80; HTTPS on port 443; Internet_Service_FTP; FTPGetCurrentDirectory; FTPSetCurrentDirectory; FTPFindFirstFile; FTP file finding; InternetFindNextFile; TWin32FindData; File date and time; Listing files on ftp server; GOPHER_FIND_DATA; Multi-threading; Callbacks; InternetSetStatusCallback; FTP browser example

Under Construction: Pooling And Brokering
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	60 : August 2000	View article	View source code
Summary	Bob Swart returns to MIDAS 3 to explain Object Pooling and Object Brokering. If your web applications are feeling the strain and you need to share the software load over multiple servers, these technologies could provide just what you need.
Keywords	Under Construction; MIDAS 3; Object pooling; Object brokering; TWebConnection; TDCOMConnection; Remote data module wizard; Single or multiple instance; OnBeforeGetRecords; State information; RegisterPooled; UnregisterPooled; Shared remote data modules; Shared MIDAS servers; TCorbaConnection; TSocketConnection; TCustomObjectBroker; ServerName or ServerGUID; TSimpleObjectBroker; Load balancing; GetComputerForGUID; GetComputerForProgID; GetPortForComputer; TServerCollection; LastConnectionTimeStamp

Focus Made Easy
Authors	Hart Kerbel		Type: Article
Issue	60 : August 2000	View article	View source code
Summary	Hart Kerbel shares the analysis, design and implementation lessons he learnt when developing CtlFocus: a non-visual component designed to show users clearly exactly which control currently has focus should they look away from the screen and back again. Ideal for data entry tasks.
Keywords	Which control has focus?; Changing control focus; CtlFocus component; Data entry; Highlight control with focus; OnActiveControlChange; Screen object; OnActiveFormChange; Event handler chain; Default TButton; CM_FOCUSCHANGED; VCL messages; CM_ messages; TCustomForm; TCMFocusChanged; Container controls; TWinControl and TComponent; Form subclassing; Windows subclassing; WndProc address; CM_ACTIVATE; CM_DEACTIVATE; RTTI; TypInfo unit

Unexpected COM Error
Authors	Brian Long		Type: Clinic
Issue	60 : August 2000	View article	View source code
Summary	Unexpected COM Error
Keywords	Automation server error; Input-synchronous call; Outgoing call cannot be made; Unexpected COM errors; IDispatch.GetIDsOfNames; DISP_E_UNKNOWNNAME; RPC_E_CANTCALLOUT...; COM threading; STA threading model; COM proxy object; COM and timers; InSendMessage

Delphi And Email
Authors	Brian Long		Type: Clinic
Issue	60 : August 2000	View article	View source code
Summary	Delphi And Email
Keywords	Sending email; Email components; MAPI; TMapiRecipDescrip; TMapiFileDesc; Automating Outlook; SMTP

Component Construction
Authors	Brian Long		Type: Clinic
Issue	60 : August 2000	View article	View source code
Summary	Component Construction
Keywords	Component construction; Form events sequence; CreateNew constructor; Form Create constructor; fsCreating in FormState; Determine form state; FindClass; csLoading, csReading; ComponentState; Determine component state; Form inheritance; Streams; Loaded; AfterConstruction

Code Completion
Authors	Brian Long		Type: Clinic
Issue	60 : August 2000	View article	View source code
Summary	Code Completion
Keywords	Code completion; Class completion; Using inherited; Using override

Streaming Delphi Components
Authors	Jason Southwell		Type: Article
Issue	61 : September 2000	View article	View source code
Summary	Jason Southwell shows us how to stream components. The article describes a practical use of the ReadComponent and WriteComponent routines in creating a screen saver generator application.
Keywords	Streaming components; Screensaver; Streams; TStream; ReadComponent; WriteComponent; ReadComponentRes; WriteComponentRes; Streaming Windows resources; Screensaver generator; Slideshow; .SCR files; RegisterClass declared twice

Borland Conference 2000
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	61 : September 2000	View article	No source code
Summary	Bob Swart reports from Borland's 11th annual conference, held this year in San Diego. What's new, what's cool and what might be coming to a computer near you sometime soon!
Keywords	Borland Conference 2000

Under Construction: Delphi And Strings
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	61 : September 2000	View article	View source code
Summary	Strings: we use them all the time and know everything there is to know about them, right? Wrong! Bob Swart delves under the hood to explain the various character and string types available in Delphi, how they work and which ones are appropriate to which use.
Keywords	Under Construction; Strings; Using string types; Choosing string types; Character types; Char, AnsiChar, WideChar; ANSI character type; Unicode; Ord, Chr, UpCase; Character functions; Ordinal number of character; PChar; PAnsiChar, PWideChar; Null terminated strings; C/C++ char* type; $X+ compiler directive; ShortString, short string; $R+ compiler directive; Uppercasing strings; String performance; Long strings, AnsiString; Reference counted strings; UniqueString; LongString; AnsiString performance; Wide strings; WideString and COM; ResourceString

Actions And Action Lists
Authors	Brian Long		Type: Article
Issue	61 : September 2000	View article	View source code
Summary	Actions have been around since Delphi 4, but remain under-used by most developers. Brian Long thinks that's a shame and in this article sets out to show us clearly what actions and action lists are and how to use them to best effect in your applications. He also explains how to install your own new reusable actions into the Delphi IDE
Keywords	Actions and Action Lists; TActionList; Shared event handlers; User-generated commands; Trigger controls; Action clients; Action targets; Why use actions?; TImageList for action images; Action List Editor; Creating actions; Action category; Events for actions; Action event handlers; Invoking actions; Action keyboard shortcuts; ImageIndex; Custom actions; Standard actions; Pre-defined actions; Action classes: TBasicAction; TContainedAction; TCustomAction; THintAction; Action link classes; Actions, data-aware controls; TBasicActionLink; TActionLink; TMenuActionLink; TControlActionLink; TToolButtonActionLink; Action architecture; Updating actions; Creating standard actions; Initialise standard actions; Register standard actions; Data modules and actions

Beating The System: Easy Internet, 2
Authors	Dave Jewell		Type: Article
Issue	61 : September 2000	View article	View source code
Summary	Dave Jewell concludes his examination of the WinInet API. Having established the basics, this month he moves on to ftp file downloading.
Keywords	Internet applications; WinInet; Downloading files using FTP; FtpGetFile; InternetReadFile; Size of files for FTP; FTP browser; Beating the System

Algorithms Alfresco: Caching In On Algorithms
Authors	Julian Bucknall		Type: Article
Issue	61 : September 2000	View article	View source code
Summary	Julian Bucknall gives us a case study in choosing and implementing algorithms and data structures for a real world project: a file cache for use in (say) a web browser app. Along the way he covers caching principles, hash tables, priority queues and streams.
Keywords	Algorithms Alfresco; Caching algorithms; File cache; Setting maximum cache size; Chooisng algorithms; Choosing data structures; Clearing a cache; Streams; Buffered file stream; File cache class; Hash table versus StringList; Priority queue; Chooisng data structures; Collisions in hash tables; Linear probing; Hash table load factor; Chaining; Collision resolution methods

Creating Browser Help Objects
Authors	Eyal Hirsch		Type: Article
Issue	61 : September 2000	View article	View source code
Summary	Eyal Hirsch shows how you can plug your code right inside Internet Explorer to do some pretty neat tricks. All the information you need is here, plus an example to base your own projects on
Keywords	Web browsers; Extending Internet Explorer; Browser help objects, BHO; COM programming; Internet Explorer extensions; Automation objects; Registering a BHO; CoClass GUID; IE5 BHO bug; Multiple BHOs in IE5; IObjectWithSite; IWebBrowser2; SHDocVW unit; Web browser events; Registering a BHO; Browser form manager; Manipulating HTML in IE5; MSHTML unit

Design By Contract
Authors	Sascha Frick		Type: Article
Issue	61 : September 2000	View article	View source code
Summary	Sascha Frick explains what design by contract means, how it improves your development process and how to implement it using Delphi's support for assertions and invariants.
Keywords	Deign by contract; Software design; Object oriented development; OOP; Inheritance and aggregation; Bertrand Meyer; Eiffel language; Assertions; Programmer errors; Breach of contract; Assert procedure; EAssertionFailed; $ASSERTIONS; $C compiler directive; Pre-conditions; Post-conditions; Invariants; Using assertions; Assertions and inheritance; Subclassing; Assertions and subclassing

One Last Compile
Authors			Type: Article
Issue	61 : September 2000	View article	No source code
Summary	Reporting for duty
Keywords	One last compile

Component Hints On Status Bars
Authors	Brian Long		Type: Clinic
Issue	61 : September 2000	View article	View source code
Summary	Component Hints On Status Bars
Keywords	Component hint on status bar; Hints on status bars; Setting up event handlers; Creating event handlers; TApplicationEvents; TStatusBar; TStatusBar.SimplePanel; AutoHint; THintAction; Actions; ExecuteAction

Tracking Actions
Authors	Brian Long		Type: Clinic
Issue	61 : September 2000	View article	View source code
Summary	Tracking Actions
Keywords	Tracking actions; Tracing action execution; TApplication.OnExecuteAction

Unwanted Edit Windows
Authors	Brian Long		Type: Clinic
Issue	61 : September 2000	View article	View source code
Summary	Unwanted Edit Windows
Keywords	Unwanted edit windows; Delphi IDE; IDE keyboard problem; Scan code $7F; Virtual key code 0; Illegal keyboard scan code; KeyBd_Event; ecNewEditWindow; Invalid shortcuts

WideString Properties
Authors	Ray Lischner		Type: Article
Issue	62 : October 2000	View article	View source code
Summary	Ray Lischner explains how to use properties of type WideString in your custom components, working round the restrictions of Delphi's IDE and presenting a custom property editor.
Keywords	WideString properties; Unicode; Component properties; WideChar; Reference counting; CreateFileA and CreateFileW; PChar and PWideChar; Using Unicode strings; TWinControl and ANSI; DefineProperties; DefineProperty; TReader, TWriter; Streams; Writing property editors; WideString property editor; TStringProperty; RTTI for properties; TypeInfo.GetPropInfo; Owner draw property editor; Storing WideStrings in .DFM

Under Construction: Local ClientDataSets
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	62 : October 2000	View article	View source code
Summary	MIDAS isn't just for multi-tier apps, says Bob Swart, but we can use it as a handy, compact and very fast local database engine, with just one DLL to ship (and no licence fees either!). Bob goes on to show how to use XML to get data into and out of a local ClientDataSet.
Keywords	Under Construction; Local ClientDataSets; TClientDataSet; MIDAS; MIDAS.DLL; In-memory database; Load data into ClientDataset; ClientDataSet and XML; XML metadata and row data; ADODataSet XML; Convert dataset to XML; Export dataset to XML; Convert XML to dataset; Create table from XML; XML tag; Field definitions in XML

Effective Delphi Class Engineering Part 4: The TObject Of My
Authors	David Baer		Type: Article
Issue	62 : October 2000	View article	View source code
Summary	David Baer focuses on inheritance in this part of his popular series on object oriented development in Delphi.
Keywords	Class engineering; TObject; Inheritance; Object oriented development; OOP; Designing classes; ClassName function; Class member visibility; Private, public, protected; Protected class members; Inherited methods; Override directive; Virtual methods; Polymorphism; Virtual method table VMT; vmtInstanceSize; vmtNewInstance; vmtFreeInstance

Searching In ADSI
Authors	Marc Scheuner		Type: Article
Issue	62 : October 2000	View article	View source code
Summary	Marc Scheuner knows that Active Directory Service Interfaces (ADSI) is a powerful set of COM objects and interfaces dealing with directories, supporting Active Directory, Novell's Netware 3.x and NDS, plus Microsoft Windows NT Server and IIS. But he also knows that using COM interfaces can be quite a challenge, so here he presents a Delphi component to wrap up the search capabilities offered by ADSI.
Keywords	Searching in ADSI; ADSI; Active Directory Service; LDAP; Directory Access Protocol; Novell Netware NDS; ADSI component; COM programming; IDirectorySearch; ADO queries and ADSI; ActiveDs.dll; Dual interfaces; Late binding; Search base; AbandonSearch; ExecuteSearch; Wrapping COM objects; CoInitialize, CoUnInitialize; LDAP filter syntax; Wide strings; OLE BSTR strings; Delphi unicode library; LDAP search expressions

Algorithms Alfresco: Careless Memories
Authors	Julian Bucknall		Type: Article
Issue	62 : October 2000	View article	View source code
Summary	Julian Bucknall has been studying the heap manager in Delphi 5 in an ugly debugging odyssey and shares the fruits of his labour: the structures and algorithms it uses, plus useful code and structures for tracking down nasty bugs that trash the heap manager.
Keywords	Debugging the heap manager; Delphi heap manager; Heap memory; Invalid pointer operation; FreeMem, Dispose; GetMem, New; Destroy; Memory management; ShareMem unit; Borlndmm.dll heap manager; GetMemoryManager; SetMemoryManager; TMemoryManager; Exceptions in heap debugging; Memory alignment; Free list; Previous free block is bad; Memory overwrites; Guard bytes; Guard blocks; Delayed freeing; GetProcessHeap; TQueue; Text file device driver

One Last Compile
Authors			Type: Article
Issue	62 : October 2000	View article	No source code
Summary	The Midas Touch
Keywords	One last compile

Beating The System: Delphi Hails A CAB
Authors	Dave Jewell		Type: Article
Issue	62 : October 2000	View article	View source code
Summary	Dave Jewell investigates Microsoft's CAB file format and develops a Delphi class to access CAB files from your own applications, wrapping up the provided API into something a whole lot easier to use.
Keywords	Beating the System; CAB files; Microsoft cabinet files; Cabinet.dll; CAB SDK; Compression, decompression; Creating CAB files; FDICreate; FDIDestroy; FDIIsCabinet; TFDICabinetInfo; CAB file folders; Spanning; FDICopy; FDINotify; CDECL calling convention; Callbacks; TFDINotification; Wrapping the CAB API

Webifying Outlook
Authors	Jani Jarvinen		Type: Article
Issue	62 : October 2000	View article	View source code
Summary	Jani JΣrvinen wanted to be able to get addresses out of his Outlook address book over the web from thousands of miles away... Impossible? No, it just needs some lateral thinking and clever ideas. Jani shares all.
Keywords	Microsoft Outlook; Access Outlook from the web; Outlook over internet; Web interface for Outlook; ISAPI applications; Web applications; COM applications; WebBroker; Web server; Named pipes; Inter-process communication; IPC; StringReplace; ReadFile, WriteFile; Blocking functions; Communicating with Outlook; Constructing a calendar; IsLeapYear; Leap year; Cache; Cannot open pipe

Linking Data Files
Authors	Brian Long		Type: Clinic
Issue	62 : October 2000	View article	View source code
Summary	Linking Data Files
Keywords	Linking data files into .EXE; Binary to object converter; BinObj32; Binary to .OBJ; Linking bitmap into .EXE; External directive; TBitmapFileHeader; TMemoryStream; Interposer class; TMemoryStream.SetPointer; Custom resources; Compiling resources

CPU Window Bafflement
Authors	Brian Long		Type: Clinic
Issue	62 : October 2000	View article	View source code
Summary	CPU Window Bafflement
Keywords	Using the CPU window

Array Distinction
Authors	Brian Long		Type: Clinic
Issue	62 : October 2000	View article	View source code
Summary	Array Distinction
Keywords	Open array and dynamic array; Open parameter types; Open array parameters; Variant open array; TVarRec

Corrupt Component Palette
Authors	Brian Long		Type: Clinic
Issue	62 : October 2000	View article	View source code
Summary	Corrupt Component Palette
Keywords	Corrup component palette; Video card driver problems; Graphics cards; Comctl32.dll; BusThrottle in system.ini

Drag And Dock
Authors	Brian Long		Type: Article
Issue	63 : November 2000	View article	View source code
Summary	Brian Long demonstrates how to use Delphi's docking features in your applications to best effect: pitfalls for the unwary and tips to wow your users with!
Keywords	Dragging and docking; Docking windows; Drag and drop; Docking toolbars; TToolbar; Undocking, ripping off; DragMode, DragKind; Dock image; Floating toolbar; Mouse.DragThreshold; BeginDrag; Mouse.DragImmediate; DockSite, dock site; OnStartDock, OnEndDock; OnDockOver; OnDockDrop; MouseDeltaY problem; TDragDockObject; MouseDeltaX; OnGetSiteInfo; Form grabber; UseDockManager; Panel grabber; InfluenceRect; TControlBar; TCoolBar; Programmatic docking; Automatick docking; ManualDock, ManualFloat; Floating; Is control docked?; Creating dock zones; Dock panels; Custom docking; DoAddDockClient; DoRemoveDockClient; TPageControl; TTabSheet; Custom drag image; TCustomDockForm; HostDockSite; FloatingDockSiteClass; Multiple docked clients; Dock manager; Creating dock manager; TToolDockObject

Under Construction: More Local ClientDataSets
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	63 : November 2000	View article	View source code
Summary	Bob Swart continues his examination of TClientDataSet as a small, fast local DBMS, showing how to use XML files as input for ClientDataSets, creating true thin-client applications which can communicate with a server using sockets.
Keywords	Under Construction; Local ClientDataset; TClientDataset; MIDAS; CGI applications; Web applications; Internet; Filters; n-tier applications; Sockets; TServerSocket, TClientSocket; Port numbers; Local DBMS; XML; OnClientConnection

BorDebug: Return Of The Giant
Authors	Hallvard Vassbotn		Type: Article
Issue	63 : November 2000	View article	View source code
Summary	Hallvard Vassbotn describes how to use Borland's recently released BorDebug.DLL to read and interpret TD32 debugger information in our own applications, making it possible to introduce some very powerful debugging options.
Keywords	BorDebug.DLL; Debugging; Turbo debugger 32, TD32; Reading debugger data; IDE debugger; Turbo Debugger file format; Microsoft debugger format; Giant.txt; Giant format; Debugging settings; Compiler configuration; MAP files; TDStrp32.exe; Stripping out debug data; EXE file structure; .TDS files; BorDebugRegisterFile; EXE file subsections; Modules; BorDebugSubSectionCount; AlignSym; Segments; Source module ranges; Source file ranges; GlobalSym; GlobalPub; Symbol type index; BorDebug wrapper classes; Debug data dump

Effective Delphi Class Engineering Part 5: You Are TEgg Man...
Authors	David Baer		Type: Article
Issue	63 : November 2000	View article	No source code
Summary	David Baer has not gone mad (though he may have been listening to too many old Beatles albums!): this instalment of his series continues his practical real-world discussion of polymorphism and inheritance.
Keywords	Effective Class Engineering; Abstract methods; Polymorphism; TStream, stream objects; Virtual methods; TStrings; Manage and store strings; Designing class hierarchies; Class design; Object oriented; OOP; Inheritance; Dynamic methods; VMT virtual method table; Constructors; Class methods; NewInstance; inherited keyword; Hidden properties; Inherited properties; Inherited method calls; Multiple inheritance; Compiler hints and warnings; Reintroduce keyword; Suppress warnings

One Last Compile
Authors			Type: Article
Issue	63 : November 2000	View article	No source code
Summary	In The Frame
Keywords	One last compile...

Beating The System: A Smorgasbord Of GDI Wonders
Authors	Dave Jewell		Type: Article
Issue	63 : November 2000	View article	View source code
Summary	Dave Jewell delves into some little-known areas of the Windows API to uncover a variety of useful gems, such as getting and changing the display mode, plus creating 'marching ant' effects for rubber band style selection areas in your applications.
Keywords	Beating the System; GDI graphics; Windows API; Display mode enumeration; Available resolutions; QuickRes; EnumDisplaySettings; Screen size; GetDeviceCaps; Enum_Current_Settings; Changing display mode; Changing screen resolution; ChangeDisplaySettings; Marching ants; Highlight selected item; LineDDA; Delphi DCU file format; DeDe Delphi decompiler

Delphi Junction: The Sequel
Authors	David Baer		Type: Article
Issue	63 : November 2000	View article	No source code
Summary	David Baer gives you another chance to test your knowledge with a Delphi-based crossword.
Keywords	Delphi junction crossword; Crossword puzzle

Algorithms Alfresco: Come Together
Authors	Julian Bucknall		Type: Article
Issue	63 : November 2000	View article	View source code
Summary	Julian Bucknall tackles the problem of sorting large files of data by explaining the mergesort algorithm. So stop loading that 100Mb data file into a sorted StringList right now and read on!
Keywords	Algorithms Alfresco; Sorting large files; Sorting algorithms; Quicksort problems; Mergesort, merge sort; Heapsort; File-based sorting

InterBase Generators
Authors	Brian Long		Type: Clinic
Issue	63 : November 2000	View article	View source code
Summary	InterBase Generators
Keywords	InterBase generators; Generate unique value; Generate unique key; AutoGenerateValue; arAutoInc; Auto incrementing; AutoRefresh

VCL Debugging Query
Authors	Brian Long		Type: Clinic
Issue	63 : November 2000	View article	View source code
Summary	VCL Debugging Query
Keywords	Avoid debugging the VCL; Debugger; Turn Debug DCUs off

BDE Paradox User Limit
Authors	Brian Long		Type: Clinic
Issue	63 : November 2000	View article	View source code
Summary	BDE Paradox User Limit
Keywords	BDE Paradox user limit

Strange Form Behaviour
Authors	Brian Long		Type: Clinic
Issue	63 : November 2000	View article	View source code
Summary	Strange Form Behaviour
Keywords	Label captions missing; Splash screen; Application.ProcessMessages

Task Manager Figure
Authors	Brian Long		Type: Clinic
Issue	63 : November 2000	View article	View source code
Summary	Task Manager Figure
Keywords	NT task manager; Memory usage; QueryWorkingSet; GetHeapStatus; GlobalMemoryStatus

Property Editor Question
Authors	Brian Long		Type: Clinic
Issue	63 : November 2000	View article	View source code
Summary	Property Editor Question
Keywords	Property editors; RegisterIntegerConsts; Integer constant properties

Scrolling System Tray Text
Authors	Brian Long		Type: Clinic
Issue	63 : November 2000	View article	View source code
Summary	Scrolling System Tray Text
Keywords	Scrolling system tray text

Using InterBase From Delphi
Authors	Nigel Cohen		Type: Article
Issue	64 : December 2000	View article	View source code
Summary	Nigel Cohen explains how to get started with InterBase if you've never dipped a toe in the client/server database waters before. Whether you're looking to leave the BDE behind or wanting to take full advantage of the opportunities offered by Kylix, this is for you.
Keywords	Using InterBase from Delphi; Database; Client/Server; Not using BDE; Kylix, Linux; InterBase Express, IBX; TIBDatabase; TIBTransaction essential; TIBTable; TIBQuery; Transactions; StartTransaction; Rollback; Commit; TDataset; IBExpress; DBExpress; Installing InterBase; IBPhoenix; Open Source; Windows NT service pack 5; Metadata; SQL command text editor; Basic SQL commands; SQL SELECT; SQL UPDATE; SQL INSERT, DELETE; SQL WHERE; SQL string matching % and *; SQL wildcards; SQL SUM, AVG COUNT; InterBase View; Stored procedures

Algorithms Alfresco: The Holly And The Ivy
Authors	Julian Bucknall		Type: Article
Issue	64 : December 2000	View article	View source code
Summary	Julian Bucknall has a stocking full of festive algorithms developed in co-operation with Father Christmas.
Keywords	Algorithms Alfresco; Creation order of objects; Debugging; Constructor; GetMem; NewInstance; FreeInstance; TObject.Create; Custom heap manager; EBP stack base pointer; System._GetMem; Memory fragmentation; Heap fragmentation; Memory manager; Weighted random numbers; Percentiles; Partition algorithm; Mergesort arbitrary data; Zlib compression

Getting Clever With WebBroker... Without The Web
Authors	Paul Warren		Type: Article
Issue	64 : December 2000	View article	View source code
Summary	Paul Warren uses HTML a lot to provide output from his applications and has discovered that WebBroker provides an ideal way to generate that output using user-modifiable template files. And it all works just fine without the web!
Keywords	WebBroker without the web; Generating HTML output; TPageProducer; HTMLFile; HTML template files; Replacing HTML tags; Saving TPageProducer output; Form printing; Form templates; Database reports; DataSetPageProducer; PageProducer text parsing

Beating The System: IDE Secrets, Part 1
Authors	Dave Jewell		Type: Article
Issue	64 : December 2000	View article	View source code
Summary	Dave Jewell has been taking apart the Delphi IDE again, to discover a neat way to create Experts which will augment the capabilities of our favourite development environment. Including painless dockable IDE windows and toolbar forms.
Keywords	Beating the System; Delphi IDE secrets; IDE-only packages; CORIDE50 package; DSNIDE50 package; Dockable IDE add-ins; Dockable IDE windows; Writing IDE experts; TIExpert; TDockableForm; TDesktopForm; DeskForm unit; RegisterDesktopFormClass; DeskUtil; Desktop configuration file; SaveWindowState; IDE toolbar forms; TDockableToolbarForm; IDECommandButton; TCommandButton

The Hidden Power Of Jet
Authors	Guy Smith-Ferrier		Type: Article
Issue	64 : December 2000	View article	View source code
Summary	Guy Smith-Ferrier explains that Microsoft's Jet engine is not just for interfacing with MS Access databases. Did you know it can talk to Paradox files, Excel, structured text files, and even HTML tables?
Keywords	Jet database engine; Jet OLE DB provider; MDAC; Installable ISAM drivers; Paradox through Jet; TADOTable; Excel through Jet; TADOTable; Jet Extended Properties; Schema.ini; Text ISAM driver; Jet data export; Jet HTML data import

Under Construction: Wireless Application Protocol
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	64 : December 2000	View article	View source code
Summary	Bob Swart has been pushing the envelope of new technology: he explains what WAP is all about and how to create applications for generating the WML XML-like code that WAP phones use.
Keywords	Under Construction; WAP; Wireless; WML; Mobile phones; Nokia WAP toolkit; XML; WML tags; WMLScript, ECMAScript; WebBroker and WML; Dynamic WML; ISAPI; DataSetPageProducer; WAP gateway

One Last Compile
Authors			Type: Article
Issue	64 : December 2000	View article	No source code
Summary	The Joy Of SQL
Keywords	One last compile

Solution To Delphi Junction: The Sequel
Authors	David Baer		Type: Article
Issue	64 : December 2000	View article	No source code
Summary	David Baer gives us the solution to last month's crossword. If you got it right, award yourself a dozen extra mince pies!
Keywords	Delphi Junction solution; Crossword puzzle

Successful Web Application Design
Authors	Jason Southwell		Type: Article
Issue	64 : December 2000	View article	No source code
Summary	Jason Southwell explains some of the principles behind designing web applications that are going to work, including five steps to avoid common pitfalls, based on his own extensive experience.
Keywords	Web application design; Internet; World wide web www; Internet integration; ISAPI, CGI, WinCGI; Scalability; Stress testing

Extending Actions
Authors	Brian Long		Type: Clinic
Issue	64 : December 2000	View article	View source code
Summary	Extending Actions
Keywords	Extending actions; Custom actions; Standard actions; Actions and Action lists; SendAppMessage

InActiveX
Authors	Brian Long		Type: Clinic
Issue	64 : December 2000	View article	View source code
Summary	InActiveX
Keywords	ActiveX in Internet Explorer; ActiveX Licensing; IClassFactory2; Licence file .LIC; CreateInstanceLic; RequestLicKey; Licence package file .LPK; License Package Authoring; LPK_Tool.exe; HTML OBJECT tag

Unit Usage
Authors	Brian Long		Type: Clinic
Issue	64 : December 2000	View article	View source code
Summary	Unit Usage
Keywords	Unit usage; Unused units in uses; Uses clause

Paper Orientation
Authors	Brian Long		Type: Clinic
Issue	64 : December 2000	View article	View source code
Summary	Paper Orientation
Keywords	Change paper orientation; Printer DEVMODE; DM_ORIENTATION; Printing; TPrinter; GetPrinter, SetPrinter; GlobalLock, GlobalUnlock; Handle to pointer; OpenPrinter; DocumentProperties

Debugger Glitch
Authors	Brian Long		Type: Clinic
Issue	64 : December 2000	View article	View source code
Summary	Debugger Glitch
Keywords	Debugging; Stepping through code; Gutter width

IDE Anomaly
Authors	Brian Long		Type: Clinic
Issue	64 : December 2000	View article	View source code
Summary	IDE Anomaly
Keywords	Minimize on run; Delphi IDE

Debugger Failure
Authors	Brian Long		Type: Clinic
Issue	64 : December 2000	View article	View source code
Summary	Debugger Failure
Keywords	Debugging; Integrated debugger; bordbk50.dll missing; Debugger kernel missing

Missing Code Parameters
Authors	Brian Long		Type: Clinic
Issue	64 : December 2000	View article	View source code
Summary	Missing Code Parameters
Keywords	Code Parameters tooltip

Maximizing Web Applications With Database Pools
Authors	Jason Southwell		Type: Article
Issue	65 : January 2001	View article	View source code
Summary	Jason Southwell addresses the problem of getting your database-driven web applications to scale seamlessly, showing how to implement database connection pooling to avoid those awful 'site busy...' messages.
Keywords	Database pools; Web applications; Scalability; CGI; Internet; InterBase; Database connection delay; ISAPI; Query queues; Database pool component; InterBase Express IBX; Query queue component

Beating The System: Delphi Meets .NET
Authors	Dave Jewell		Type: Article
Issue	65 : January 2001	View article	View source code
Summary	Dave Jewell has been poking around in Microsoft's goodie bag again, this time inside the GDI+ DLL which is part of the Redmond giant's exciting new .NET framework. He explains how we can access GDI+ from Delphi to use some cute new drawing capabilities: clever brushes, alpha blending and more.
Keywords	Delphi and .NET; GDI+; .NET framework; Using .NET libraries; GDIPLUS.DLL; SystemDrawing.dll; ILDASM; GdipCreatefromHDC; Graphics surface; Device context handler; GDI+ brushes; Transparency; GDI+ brush types; Draw arbitrary paths; Graphics; Bezier curves; Gradient fills

The Data Shape OLE DB Provider
Authors	Guy Smith-Ferrier		Type: Article
Issue	65 : January 2001	View article	No source code
Summary	Guy Smith-Ferrier explains how this provider, also known as MSDataShape and introduced in ADO 2.0, provides some useful functionality: hierarchical recordsets, parameterised hierarchies, reshaping, aggregate functions, grouping, adding blank fields and more.
Keywords	Data shape OLE DB provider; ADO recordsets; ADOExpress; TClientDataset; MSDataShape; Hierarchical recordsets; Master/detail; SQL SHAPE; Persistent datasets; SQL RELATE; ADOExpress bug; Reshaping; Aggregate functions; Grouping data with COMPUTE; Adding blank fields; Custom shapes

Algorithms Alfresco: The Man-Machine
Authors	Julian Bucknall		Type: Article
Issue	65 : January 2001	View article	View source code
Summary	Julian Bucknall investigates state machines (or finite automata if you want to be clever), showing how they can provide elegant and efficient solutions to a number of programming problems.
Keywords	Algorithms Alfresco; Finite automata; Finite state machines; Replace characters in string; States, tokens; Search and replace; String replacement; Automaton; Deterministic; Non-deterministic; String validation; Backtracking; Regular expression matching

Effective Delphi Class Engineering Part 6: To Talk Of Many Thing
Authors	David Baer		Type: Article
Issue	65 : January 2001	View article	View source code
Summary	David Baer concludes his series on developing Delphi classes with a miscellany of sound advice, ranging from events to exceptions, RTTI and message handling.
Keywords	Class engineering; Class design; OOP; Object oriented; Using events; Procedural types; Event handlers; Creating new event types; Custom events; TNotifyEvent; Sender; Exceptions; Exception handling; Exception types; Try..except; Assign method; TPersistent; RTTI for classes; Message handling; Message handler

Under Construction: Wireless Application Protocol, Part 2
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	65 : January 2001	View article	View source code
Summary	Bob Swart continues his explanation of writing applications that your WAP phone can access, covering the use of WAP images in the WBMP format.
Keywords	Under Construction; WAP; Wireless devices; Mobile phones; WML; WML images, WBMP; Mime types; HTTP headers; Generating WBMP; Dynamic images; Internet; DatasetTableProducer for WML; WebBroker and WML; Generating WML; Database and WML

One Last Compile
Authors			Type: Article
Issue	65 : January 2001	View article	No source code
Summary	The Empire Strikes Back
Keywords	One last compile...

Time Is The Simplest Thing
Authors	Primoz Gabrijelcic		Type: Article
Issue	65 : January 2001	View article	View source code
Summary	...not! Primoz Gabrijelcic has been researching the different time systems used throughout the world and constructing a library of routines for converting between them.
Keywords	Time zone conversion; Time standards; Daylight saving time; GMT; Coordinated Universal Time; Swatch Internet Time; UTZ PST TZ; ESBDates package; TTimeZoneInformation; TIME_ZONE_INFORMATION; British Summertime; Bias, DaylightBias; Date formats; TDateTime; Day in a month format; Day of the month; Calendar

DataSet Actions Flaw
Authors	Brian Long		Type: Clinic
Issue	65 : January 2001	View article	View source code
Summary	DataSet Actions Flaw
Keywords	DataSet actions problem; Standard actions; UpdateAction; ExecuteAction; UpdateTarget; ExecuteTarget

VCL Keystroke Behaviour
Authors	Brian Long		Type: Clinic
Issue	65 : January 2001	View article	View source code
Summary	VCL Keystroke Behaviour
Keywords	VCL keystroke handling; Alt key behaviour on a form; MDI and SDI; HookMainWindow

Problematic Custom Edit Control
Authors	Brian Long		Type: Clinic
Issue	65 : January 2001	View article	View source code
Summary	Problematic Custom Edit Control
Keywords	Custom edit control; TCustomControl; Keyboard shortcuts; Forms and dialogs; wm_GetDlgCode; DLG_WANTCHARS; WM_CHAR; Processing keystrokes

Drag And Drop Hot Spots
Authors	Brian Long		Type: Clinic
Issue	65 : January 2001	View article	View source code
Summary	Drag And Drop Hot Spots
Keywords	Drag and drop hot spots; Custom drag object; Custom drag image; Custom drag cursor; TDragImageList; SetDragImage

Records In Variants
Authors	Brian Long		Type: Clinic
Issue	65 : January 2001	View article	View source code
Summary	Records In Variants
Keywords	Records in variants; ActiveX; Packed record; OleVariant; Automation objects; Safecall calling convention; Automation-compatible types; VarArrayCreate; Array from Variant

Conditional Compilation
Authors	Brian Long		Type: Clinic
Issue	65 : January 2001	View article	View source code
Summary	Conditional Compilation
Keywords	Conditional compilation; $DEFINE; $IFDEF; $UNDEF

SQL Components
Authors	Nando Dessena		Type: Article
Issue	66 : February 2001	View article	View source code
Summary	Nando Dessena presents a framework for building search forms against relational client/server databases.
Keywords	SQL components; Searching databases; Database search; Client/server; Searching and filtering; Ranges, filters; Lookup; Building SQL queries; InterBase

Algorithms Alfresco: Everything Put Together Falls Apart
Authors	Julian Bucknall		Type: Article
Issue	66 : February 2001	View article	View source code
Summary	Julian Bucknall builds on last month's explanation of state machines (or, if you prefer, finite automata) to describe the parsing, compiling and use of regular expressions.
Keywords	Algorithms Alfresco; Regular expressions; Finite state machines; Expression matching; Parse regular expression; Parsing; Regex; Top-down parser; Recursive descent parser; Metacharacter; Grammar; Regular expression parser

Custom Shell Verbs Using DDE
Authors	Brian Long		Type: Article
Issue	66 : February 2001	View article	View source code
Summary	Brian Long shows that DDE is not dead and still has a useful part to play in a developer's toolkit. The official way to add custom items to a file's context menu in Windows Explorer is to write a COM shell extension object... but it turns out DDE is a whole lot easier and is also the technique used by Microsoft!
Keywords	Custom shell verbs; DDE; Windows Explorer; DDE handler; Shell extension objects; COM shell extensions; DDE server; DDE service; ddeMgr.Appname; DDE macro; File association; DDE message; ShellExecute, ShellExecuteEx; Write DDE server; TDdeServerConv bug; Canonical verbs; Parsing; OnExecuteMacro

Beating The System: IDE Secrets, Part 2
Authors	Dave Jewell		Type: Article
Issue	66 : February 2001	View article	No source code
Summary	Dave Jewell returns to poring over the entrails of the Delphi IDE, in particular the undocumented DSNIDE50 package, showing how we can use it to make better IDE wizards.
Keywords	Beating the System; Delphi IDE secrets; DSNIDE50; IDE Experts; DeskForm, DockToolForm; DSGINTF; DockableToolbarForm; Docking forms Delphi IDE; Toolbar forms Delphi IDE; Deciphering DCU files; IDEMessages; Delphi IDE messages; TJoinDockForm

One Last Compile...
Authors			Type: Article
Issue	66 : February 2001	View article	No source code
Summary	Wired up and winding down.
Keywords	One last compile...

Under Construction: VisiBroker 3.3 for Delphi 5
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	66 : February 2001	View article	View source code
Summary	Bob Swart explains the goodies available in the latest version of Borland's tool for making CORBA applications easier for Delphi developers, including a new and much improved IDL2Pas.
Keywords	Under Construction; VisiBroker 3.3 for Delphi 5; IDL2Pas; CORBA; Create CORBA servers; IDL Interface definition; CORBA client; Basic Object Adaptor BOA; BOA.ImplIsReady; BOA.ObjIsReady; CorbaInitialize; Server skeleton; Client stub

Refactoring In The Real World
Authors	Brandon Smith		Type: Article
Issue	66 : February 2001	View article	No source code
Summary	Brandon Smith shows how he used the principles of refactoring in a real-world project: a handy utility to build multi-application projects using the Delphi command-line compiler.
Keywords	Refactoring; Martin Fowler; Converting procedural code; Converting code to OO; N-Tier applications; Multi-tier; Project builder utility; Build and make projects; Building components; Command line compiler; DCC32.exe; Redirect DOS process output; Bad smells; Speculative generality; Long method stink

Using XML And XSLT In Delphi
Authors	Craig Murphy		Type: Article
Issue	66 : February 2001	View article	View source code
Summary	Craig Murphy decrypts the latest crop of acronyms to fly across our desks and shows how to use XML and XSLT within our Delphi apps to transform documents (such as HTML report files or websites) into other formats on demand.
Keywords	XML and XSLT; XSL Stylesheet; XML transformation; W3C standards; XML document elements; XML tags; XSLT processors; XT, Saxon; Internet Explorer 5; Namespace; Converting XML; Filtering XML elements; Using XSLT for filtering; ; XPath; ; MSXML type library; Sorting XML using XSLT; Microsoft MSXML3; XSL98 and XSLT; BizTalk Mapper

Printing Web Pages
Authors	Brian Long		Type: Clinic
Issue	66 : February 2001	View article	View source code
Summary	Printing Web Pages
Keywords	Printing web pages; Printing Internet Explorer; KeyBd_Event; Window handles; TWebBrowser; Window focus; ExecWB; QueryStatusWB; OLECMDID_PRINT

Unit Ambiguity
Authors	Brian Long		Type: Clinic
Issue	66 : February 2001	View article	View source code
Summary	Unit Ambiguity
Keywords	SetParent Windows API; VCL SetParent; Scope

Moved Components Lose Events
Authors	Brian Long		Type: Clinic
Issue	66 : February 2001	View article	View source code
Summary	Moved Components Lose Events
Keywords	Moving components; Notification messages; Windows messages; WM_COMMAND; WM_NOTIFY; Component notification

Unreadable Tooltips
Authors	Brian Long		Type: Clinic
Issue	66 : February 2001	View article	View source code
Summary	Unreadable Tooltips
Keywords	Unreadable tooltips; Code completion; Tooltip font colour color; TKibitzHintWindow; HintHidePause

Elusive Package Editors
Authors	Brian Long		Type: Clinic
Issue	66 : February 2001	View article	View source code
Summary	Elusive Package Editors
Keywords	Package editor window; Delphi IDE; Package editor not visible

A First Look At Kylix: Electric Penguins Are Go!
Authors	Dave Jewell		Type: Article
Issue	67 : March 2001	View article	No source code
Summary	Based on a late Field Test version, Dave Jewell's technical overview is designed to help you grasp what Borland's new Delphi-compatible development system for Linux is all about.
Keywords	Kylix first look review; Delphi for Linux; Pascal; CLX and VCL; Qt library; Trolltech; Unix; QObjectList; QObjectList_count; Installing Kylix; Linux distributions; VMWare; KDE; Kylix IDE; TLCDNumber; Qt widgets; Linux SO libraries; Linux DLLs; Kylix packages

Threaded Inner-Process Communication
Authors	David Selwood		Type: Article
Issue	67 : March 2001	View article	View source code
Summary	David Selwood explains how to implement communication between multiple threads, examining the different mechanisms available as well as other threading issues not covered before.
Keywords	Threaded inner-process comm; Inner-process communication; Threading; Communicate between threads; TThread; BeginThread; CreateThread; Creating threads; IsMultiThread; Initialising thread; CreateSuspended; TThread.resume; TThreadRec; TCriticalSection; Critical section; Blocking execution; Multi-threading; TryEnterCriticalSection; Thread synchronisation; Thread synchronization; TThread.Synchronize; TMultiReadExclusiveWriteS...; Multiple threads reading; Global variables and threads; ThreadVar; Thread message queues; Application.ProcessMessages; Sleeping; PostThreadMessage; SendMessage; Terminated flag; TThread.Terminate; OnTerminate; FsynchronizeException; Thread returning results; Return results from thread; FreeOnTerminate; TThread.WaitFor; Terminating threads; Deadlock; Capturing thread exceptions; Debugging threads; Delphi IDE thread status; Multiple processors; Dr Watson utility; drwtsn32.exe; TThreadList thread-safe; Thread-safe objects; Priority class; Thread priority; NORMAL_PRIORITY_CLASS; FreeAndNil; Maximum threads; Thread-safe DLLs; ShareMem; DLL_THREAD_ATTACH; Databases and threading

Under Construction: VisiBroker 3.3 For Delphi 5, Part 2
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	67 : March 2001	View article	View source code
Summary	Bob Swart continues his discussion of the new version of VisiBroker for Delphi, this month covering support for special type constructs and CORBA callbacks.
Keywords	Visibroker 3.3 for Delphi 5; CORBA; IDL; Enum, union, sequence; IDL2PAS; CORBA server; CORBA client; CORBA callbacks

Appbars And Clipboard Viewers
Authors	Paul Warren		Type: Article
Issue	67 : March 2001	View article	View source code
Summary	Paul Warren shows how to create Appbars (windows which behave just like the Windows Taskbar, docking to the side of the desktop) and implements a clipboard viewer as an Appbar.
Keywords	Appbars; Clipboard viewer; Windows taskbar; Windows API; Anchoring forms; SHAppBarMessage; APPBARDATA structure; ShellAPI.TAppBarData; BorderStyle; wmAppBarMessage; ABM_QUERYPOS; ABM_SETPOS; Appbar messages; Appbar notifications; WMWindowPosChanging; SetClipboardViewer; WM_DrawClipboard; WM_ChangeCBChain

Algorithms Alfresco: What's The Difference
Authors	Julian Bucknall		Type: Article
Issue	67 : March 2001	View article	View source code
Summary	Julian Bucknall wants to find the longest common subsequence: that's file differencing to you and me.
Keywords	File differencing; Longest common subsequence; File differences; File comparison; Comparing files; Algorithms Alfresco; File changes; Unix DIFF; WinDiff; String differences; Transforming words; String subsequence; Fibonacci number; Matrix class; Matrix algorithm

Speeding Up A Mathematical Expression Parser
Authors	Hallvard Vassbotn		Type: Article
Issue	67 : March 2001	View article	View source code
Summary	Hallvard Vassbotn discovers Pentium processor design can slow expression parsing dramatically. The cure is to generate optimised machine code at runtime. It's not as hard as it sounds!
Keywords	Mathematical expressions; Algebra; Parsing expressions; Expression parser; Formula evaluation; Generating machine code; Pentium processor; Branch prediction logic; Misprediction penalty; Stefan Hoffmeister; Parser10 library; Parser component; Mathematical functions; Delayed DLL loading; PAGE_EXECUTE flag; PAGE_EXECUTE_READWRITE; Windows 2000; Plotting XY functions; Graphs and charts; TeeChart; Code optimisation; Performance optimisation

One Last Compile...
Authors			Type: Article
Issue	67 : March 2001	View article	No source code
Summary	Getting the right package
Keywords	One last compile...

Beating The System: Taming The Windows Desktop, Part 1
Authors	Dave Jewell		Type: Article
Issue	67 : March 2001	View article	View source code
Summary	Dave Jewell reveals a useful but poorly understood technique: DLL injection, and shows how it can be used to save and restore your Windows desktop.
Keywords	Beating the System; Saving the Windows desktop; Windows desktop layout; Desktop icon locations; DLL injection; Arrange desktop icons; Windows Explorer; 12Ghosts SaveLayout; Desktop snapshot; Inter-process communication; TListView; vsIcon; COMCTL32.DLL; ProgMan program manager; GetWindow; SHELLDLL_DefView; Shell view router; Shell desktop programming; LVM_GetItemCount; CommCtrl; Hooking a thread; Application process space; Explorer address space; C++ pragma; Shared data segment; Shared data section; Hook message queue; GetWindowThreadProcessID; SetWindowsHookEx; PostThreadMessage

Debugging Windows NT Service Applications
Authors	Dennis Passmore		Type: Article
Issue	67 : March 2001	View article	View source code
Summary	Dennis Passmore explains a handy technique for debugging NT Services.
Keywords	Debugging NT services; NT Service applications; Windows NT Windows 2000; Delphi 5 built-in debugger; NT Task Scheduler; AT command; Security context; LocalSystem; Scheduling jobs; ServiceExecute

Reviewed: Plasmatech Shell Control Pack 1.5b
Authors	Chris Frizelle		Type: Review
Issue	67 : March 2001	View article	No source code
Summary	Reviewed: Plasmatech Shell Control Pack 1.5b
Keywords	Review; Shell control pack; Plasmatech; Windows shell; Windows Explorer; DirectoryListBox; FileListBox; DriveComboBox; SelectDirectory; Select a directory; Windows shell wrapper; SHBrowseForFolder

Reviewed: Dave Baldwin's HTML Display Components
Authors	Chris Frizelle		Type: Review
Issue	67 : March 2001	View article	No source code
Summary	Reviewed: Dave Baldwin's HTML Display Components
Keywords	Review; Dave Baldwin; HTML display; HTML components; HTML viewer

Transfer Efficiency
Authors	Brian Long		Type: Clinic
Issue	67 : March 2001	View article	View source code
Summary	Transfer Efficiency
Keywords	Creating DLLs; Packages; Making DLLs smaller; Smart linker

Transient Stay-On-Top
Authors	Brian Long		Type: Clinic
Issue	67 : March 2001	View article	View source code
Summary	Transient Stay-On-Top
Keywords	Transient stay-on-top; Floating windows; Docking; fsStayOnTop FormStyle; HWND_TOPMOST; SetWindowLong; SetWindowPos; WM_ACTIVATEAPP; NormalizeTopmosts; RestoreTopmosts; OnDeactivate handler; TApplicationEvents

Drag And Drop And Scrolling
Authors	Brian Long		Type: Clinic
Issue	67 : March 2001	View article	View source code
Summary	Drag And Drop And Scrolling
Keywords	Drag and drop; Scrolling treeview; Scroll when drop to treeview; OnDragOver; ScrollBars; DD_DEFSCROLLINSET; Inset region; DD_DEFSCROLLDELAY; Scroll delay; Scroll interval; DD_DEFSCROLLINTERVAL; DragScrollInset; DragScrollDelay; DragScrollInterval; win.ini; GetSystemMetrics

Distributed Application Development With SOAP
Authors	Craig Murphy		Type: Article
Issue	68 : April 2001	View article	View source code
Summary	Craig Murphy demonstrates distributed application development using Delphi with version 2 of the Microsoft SOAP Toolkit. Discover how to make SOAP work for your application needs.
Keywords	Distributed applications; SOAP; Internet, world wide web; Microsoft SOAP toolkit 2.0; UDDI, WSDL; XML; SOAP request; SOAP listener; SOAP endpoint; HTTP; SOAP message structure; SOAP envelope; SOAP header; SOAP child; ; ; Web Services; XML schema; Creating WSDL; WSML; Web Service Meta Language; Building web services; Wsdlgen.exe; MSSOAP.SoapServer; ASP request object; ASP response object; Calling web services; Consuming web services; MSSOAP.SoapClient; Registry of web services; BizTalk Server

Under Construction: Data-Awareness And Interfaces
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	68 : April 2001	View article	View source code
Summary	Bob Swart discusses data-aware components, using an IDataAware interface to conveniently and easily manage data-aware components.
Keywords	Data-aware components; Under Construction; Databases; Interfaces; Creating components; Building components; DataSource; DataField; TFieldDataLink; FFieldDataLink; DB, DBCtrls units; OnDataChange; OnUpdateData; Is a component data-aware?; Detect data-awareness; Interface method; GetInterface; Is an interface implemented?; Data-aware interface; Test for an interface

Back to Basics: A Reintroduction To Properties, Part 1
Authors	Dave Jewell		Type: Article
Issue	68 : April 2001	View article	View source code
Summary	To help those who are relatively new to Delphi and/or Kylix, Dave Jewell provides an introduction to properties and how useful they are: not just for component developers, either!
Keywords	Introduction to properties; Using properties; Properties without component; Delphi and Kylix; Object properties; How properties work; Property keyword; Reader and writer; Get and set routines; Encapsulation; Getter and setter; Private fields; Hiding the implementation; Property visibility; Scope; Indexed property

Perspectives: Microsoft Visual Studio .NET
Authors	Steve Scott		Type: Article
Issue	68 : April 2001	View article	No source code
Summary	In this new column, Steve Scott gives a personal opinion on Microsoft's forthcoming Visual Studio .NET: as an enthusiastic Delphi developer, what does VS.NET have to offer and what does Delphi need to do to continue to win the hearts of Windows developers?
Keywords	Perspectives; Microsoft Visual Studio .NET; .NET framework; VS.NET; Memory management; Garbage collection; Windows API; C# language; Intermediate language IL; Common language runtime CLR; Just-in-time compiler; Anders Hejlsberg; Pascal, Java and c#; ASP.NET

Algorithms Alfresco: The 51st State
Authors	Julian Bucknall		Type: Article
Issue	68 : April 2001	View article	View source code
Summary	Julian Bucknall returns to state machines to show how to create a parser for Object Pascal code: extracting comments and recognising language keywords, providing a foundation which could be used for a 'pretty printer' code formatter, for example. He also deals with optimisation of regex evaluation.
Keywords	Algorithms Alfresco; State machines; Regular expressions; Parsing Object Pascal; Pascal parser; Automaton; Extracting comments; Parsing by character; Streams, TStream; Stream filter; TFileStream; Read file by character; Buffered stream; Line endings; Tokenizing; Pascal tokens; Recognising keywords; Hash table; Regex testing; Exponential regex; X(.+)+X regex; Convert NFA to DFA; TList in Delphi 5; TObjectList performance; Binary tree; String matching

One Last Compile...
Authors			Type: Article
Issue	68 : April 2001	View article	No source code
Summary	Tips trom the top.
Keywords	One last compile...

Let's Cooperate
Authors	Primoz Gabrijelcic		Type: Article
Issue	68 : April 2001	View article	View source code
Summary	Primoz Gabrijelcic describes how to create and use file system-based synchronisation primitives: ideal for use with distributed systems, spread across a number of computers.
Keywords	File-based synchronisation; Synchronisation primitives; Thread synchronisation; Multi-threading; Critical section; Mutex; Semaphore; Signal; Distributed applications; Inter-process communication; Shared read mode; File-based mutex; File-based critical section; File-based group; Process group; Synchronisation event; File-based SendMessage; Single writer multiple read

Beating The System: Taming The Windows Desktop, Part 2
Authors	Dave Jewell		Type: Article
Issue	68 : April 2001	View article	View source code
Summary	Dave Jewell has the second part of his unravelling of the Windows Desktop, with more on the fascinating technique of DLL injection and how to avoid the need for C/C++!
Keywords	Beating the System; Windows desktop layout; Save desktop icons; DLL injection; Shared data segment; SetWindowsHookEx; UnhookWindowsHookEx; WM_COPYDATA; Desktop icon caption; LVM_GetItemText; LVITEM structure; Send data between processes; dwData integer not pointer; Deadlock

Auto-Repeat Toolbuttons
Authors	Brian Long		Type: Clinic
Issue	68 : April 2001	View article	View source code
Summary	Auto-Repeat Toolbuttons
Keywords	Auto-repeat buttons; Speed button, tool button; TButton; OnMouseDown; OnMouseMove; OnMouseUp; ControlState

Paradox And The Euro symbol
Authors	Brian Long		Type: Clinic
Issue	68 : April 2001	View article	View source code
Summary	Paradox And The Euro symbol
Keywords	Paradox and euro symbol; Paradox database; Euro currency symbol

Lost Variables In The Debugger
Authors	Brian Long		Type: Clinic
Issue	68 : April 2001	View article	View source code
Summary	Lost Variables In The Debugger
Keywords	Debugging; Local variable unavailable; Optimisation, optimization; Evaluate local variable; Compiler switches; Defproj.dof, Defproj.kof; Default project options

Public Properties
Authors	Brian Long		Type: Clinic
Issue	68 : April 2001	View article	View source code
Summary	Public Properties
Keywords	Public properties; Published properties; Data hiding; Using properties; Getters and setters; Get/Set routines; Accessor routines; Implementation hiding

Popup Data Grids
Authors	Brian Long		Type: Clinic
Issue	68 : April 2001	View article	View source code
Summary	Popup Data Grids
Keywords	Popup data grids; MIDAS master/detail query; Database; Remote data module; TDataSetProvider; TClientDataset; TDCOMConnection

Apache Shared Modules
Authors	Brian Long		Type: Article
Issue	69 : May 2001	View article	View source code
Summary	Brian Long shows how to create and use Apache shared modules using Kylix. Pardon? Wossat? Apache is the web server used on Linux and shared modules are the Apache equivalent to ISAPI DLLs used with Windows Internet Information Server for high performance web applications.
Keywords	Apache shared modules; Kylix; Linux; Apache web server; Web applications; Internet; CGI applications; ScriptAlias; ExecCGI; LD_LIBRARY_PATH; Set Env LANG; Linux glibc library; SysUtils.CheckLocale; Linux .so files; Shared libraries; DSO libraries; dlOpen Linux API; Linux dynamic library loader; ld.so; Locating Kylix libraries; /usr and /usr/lib; Symlinks; Apache soure code; Recompile Apache; libhttpd.so; libhttpd.ep; pthread library; Linux loader bug; Kylix shared objects Apache; Kylix help error; Configuring Kylix dbExpress; MIDAS libmidas.so.1; Loading shared modules; LoadModule; Module handler

Beating The System: Taming The Windows Desktop, Part 3
Authors	Dave Jewell		Type: Article
Issue	69 : May 2001	View article	View source code
Summary	Dave Jewell has the final part of his unravelling of the Windows desktop, showing us how to programmatically save the desktop layout and amend its look and feel at will.
Keywords	Beating the System; Windows desktop layout; dipslib.dll; Desktop icon positions; Save and restore desktop; WM_COPYDATA; DLL injection; Inject DLL into Explorer; PostMessage; PostThreadMessage; Send message to component; Non-visual components; AllocateHWnd; Forms unit; Allocate window handle; MakeObjectInstance; Window procedure; Desktop icon text colour; Transparent text background; CLR_NONE colour; Listview bug and CLR_NONE; Listview control redraw bug; Desktop icon caption; WM_GETTEXT; LVM_SETITEMPOSITION; Set desktop icon position; ListView_SetItemTextA; RedrawSingleItem bug; Redraw one listview item; LVM_FindItem; Screen resolution

Simple Scene Graph Management And 3D Rendering With OpenGL
Authors	George Black		Type: Article
Issue	69 : May 2001	View article	View source code
Summary	George Black explains scene graph management and the OpenGL rendering engine, an understanding of which is essential in order to create your own 3D rendering applications. He demonstrates the basic principles of scene management using some simple 3D objects to create a robot-shaped figure.
Keywords	Scene graph management; OpenGL 3D graphics; 3D objects; Object view culling; OpenGL Rendering; OpenGL API; OpenGL32.dll; Window handle; Device context; Window pixel format; Rendering context; Transformation matrix; Transformation matrices; ModelView matrix; ViewPort matrix; Projection matrix; Retained mode; Immediate mode; Matrix stack; Rendering invisible objects; GL_SELECT GL_RENDER; gluPickMatrix

Under Construction: DataCLX And dbExpress
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	69 : May 2001	View article	View source code
Summary	Bob Swart introduces dbExpress: the cornerstone of database access in Kylix and Delphi 6.
Keywords	Under Construction; DataCLX; dbExpress; Kylix and Delphi 6; CLX; MyBase XML database engine; VisualCLX; Data-aware components; TSQLConnection; TSQLDataset; TSQLQuery; TSQLTable; TSQLStoredProcedure; TSQLMonitor; Unidirectional cursor; Browsing backwards; TClientDataset; TSQLClientDataset; ApplyUpdates; Delta packets; AfterPost; .CDS and .XML files; Migrating from BDE; Convert BDE tables to XML

Kylix: A Technical Overview
Authors	Dave Jewell		Type: Article
Issue	69 : May 2001	View article	No source code
Summary	Now he's got his eager hands on a copy of the 'shrink-wrap' version of Kylix, Dave Jewell brings us his in-depth technical overview of the product, following on from March's introduction.
Keywords	Kylix technical overview; Review; Delphi for Linux; Linux kernel patches; Qt library; Indy, WinShoes; w2kwm Window manager; Kylix components; Kylix IDE performance; VMWare performance problem; Threading; Thrddemo; Running apps from Kylix IDE; Deploying Kylix applications; Libqtintf.so; Libqt.so; Find required libraries; ldd utility; Wine Windows emulation; Windows API; Winelib; Wine thread problems?; LD_LIBRARY_PATH; Kylixpath shell script; ~/.bashrc file; Linux "autoexec.bat"; Hidden files

XML One Conference Report
Authors	Craig Murphy		Type: Article
Issue	69 : May 2001	View article	No source code
Summary	Craig Murphy reports back on the XML One conference: what's new in the fast-paced world of XML.
Keywords	XML One conference report

Algorithms Alfresco: Manage The Damage
Authors	Julian Bucknall		Type: Article
Issue	69 : May 2001	View article	View source code
Summary	Julian Bucknall discusses compound files, otherwise known as structured storage. Ever wanted to know how to embed a whole directory and file system into one physical file? Don't miss this!
Keywords	Algorithms Alfresco; Compound files; Structured storage; Extendible hash table; File system; DOS FAT; Clusters

Back to Basics: A Reintroduction To Properties, Part 2
Authors	Dave Jewell		Type: Article
Issue	69 : May 2001	View article	No source code
Summary	Dave Jewell completes his introduction to properties, aimed especially at those who are just starting out with Delphi or Kylix, or who need a refresher.
Keywords	Introduction to properties; Back to basics; Object inspector; Published section; RTTI; Runtime type information; Read-only properties; Array properties; Default keyword; Default property; Property storage; Property persistence; .DFM form file; Streaming properties; Stored keyword; How RTTI works; RTTI implementation; Properties in .NET; Properties in c#

One Last Compile...
Authors			Type: Article
Issue	69 : May 2001	View article	No source code
Summary	Master of none.
Keywords	One last compile...

SVCom 4.0
Authors	Primoz Gabrijelcic		Type: Review
Issue	69 : May 2001	View article	No source code
Summary	Primoz Gabrijelcic reviews Alexey Dynnikov's SvCom: classes and tools for developing NT service applications.
Keywords	Review; SvCom 4.0; Alexey Dynnikov; NT service applications; NT security framework; TService; Pseudo-services; Windows 95, 98, Me; NT services emulation; NET START command

FlashFiler 2.0
Authors	Chris Frizelle		Type: Review
Issue	69 : May 2001	View article	No source code
Summary	Chris Frizelle reviews TurboPower's FlashFiler 2.0 database system.
Keywords	FlashFiler 2.0; Review; TurboPower; Database engine; Client/server; Embedded databases; SQL

Conditional Symbols
Authors	Brian Long		Type: Clinic
Issue	69 : May 2001	View article	View source code
Summary	Conditional Symbols
Keywords	Conditional symbols; Conditional defines; $DEFINE; Conditional compilation; Compiler directives; $IFDEF; DOF and KOF files; $INCLUDE include file

RTTI And Interfaces
Authors	Brian Long		Type: Clinic
Issue	69 : May 2001	View article	View source code
Summary	RTTI And Interfaces
Keywords	RTTI and interfaces; Published interface property; Kylix; ReferenceInterface; CLX

Graphics Query
Authors	Brian Long		Type: Clinic
Issue	69 : May 2001	View article	View source code
Summary	Graphics Query
Keywords	TImage apparent memory leak; Bitmap graphics; Freeing bitmaps

Intercepting Window Closure
Authors	Brian Long		Type: Clinic
Issue	69 : May 2001	View article	View source code
Summary	Intercepting Window Closure
Keywords	Intercepting window closure; Disabling Alt+F4; Disabling window close; WM_CLOSE; OnCloseQuery; CanClose

Abbreviated Emailing
Authors	Brian Long		Type: Clinic
Issue	69 : May 2001	View article	View source code
Summary	Abbreviated Emailing
Keywords	Emailing with Outlook; Communicating with Outlook; ShellExecute; URL syntax; Mailto command; Maximum URL length

Custom App Launching
Authors	Brian Long		Type: Clinic
Issue	69 : May 2001	View article	View source code
Summary	Custom App Launching
Keywords	Launching applications; Win32Check; CreateProcess; SW_SHOWMAXIMIZED; WinExec; Maximise window; ShowWindow

TOleContainer And In-place Editing
Authors	Brian Long		Type: Clinic
Issue	69 : May 2001	View article	View source code
Summary	TOleContainer And In-place Editing
Keywords	TOleContainer; In-place editing; Embedded Excel object; OleCreate; TCreateInfo; CreateType; CoCreateInstance; Force new process

Installing Kylix
Authors	Brian Long		Type: Clinic
Issue	69 : May 2001	View article	View source code
Summary	Installing Kylix
Keywords	Installing Kylix from root; Not /root/kylix; /usr/local/kylix better

Kylix Configuration Files
Authors	Brian Long		Type: Clinic
Issue	69 : May 2001	View article	View source code
Summary	Kylix Configuration Files
Keywords	Kylix configuration files

Kylix And Linux Distros
Authors	Brian Long		Type: Clinic
Issue	69 : May 2001	View article	View source code
Summary	Kylix And Linux Distros and Easter eggs
Keywords	Kylix and Linux versions; Linux distributions distros; Linux patches; Kylix Easter eggs

dbExpress Tips And Tricks
Authors	Guy Smith-Ferrier		Type: Article
Issue	70 : June 2001	View article	View source code
Summary	Guy Smith-Ferrier follows on from Bob Swart's introduction to dbExpress with a selection of more advanced tips and tricks to help you get the most from it.
Keywords	dbExpress tips and tricks; dbxdrivers dbxconnections; dbExpress drivers; Kylix; TSQLConnection; BeforeConnect; LoadParamsOnconnect; LoadParamsFromINIFile; Loading connection parameter; dbExpress metadata; GetTableNames; GetFieldNames; GetIndexNames; GetProcedureNames; GetProcedureParams; TSQLDataSet; SetSchemaInfo; Executing SQL directly; Read-only recordsets; TClientDataset; TSQLClientDataset; Execute, ExecuteDirect; dbExpress error codes; SQLConst unit; DBXError array; Connection cloning; ActiveStatements; MaxStmtsPerConn; Maximum statements; Statements per connection; AutoClone; MySQL; TSQLMonitor; SQL Monitor; Tracing SQL calls; SQLTraceDesc; Displaying TSQLMonitor data; dbExpress performance; Deploying dbExpress; DBEXPINT.DLL; libsqllib.so.1; MIDAS.DLL; midas.so; Statically linking dbExpress

Under Construction: WebBroker For Linux
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	70 : June 2001	View article	View source code
Summary	Bob Swart shows how we can use Kylix to create web server applications for the Apache web server running on Linux, with the built-in Web Broker technology found in the Kylix Server Developer Edition.
Keywords	Under Construction; WebBroker for Linux; Apache web server; Web applications; Internet; Kylix; Web modules; TWebDispatcher; WebActionItem; PathInfo; SetEnv LD_LIBRARY_PATH; httpd.conf file; TPageProducer; Cookies; CookieFields; ContentFields; QueryFields; HTMLDoc HTMLFile; TDataSetTableProducer; TSQLConnection; Deploying Kylix web apps; SetEnv LANG in httpd.conf; SetEnv HOME in httpd.conf

How CLX Uses Qt
Authors	Brian Long		Type: Article
Issue	70 : June 2001	View article	View source code
Summary	Brian Long looks under the hood of the CLX library, used in Kylix and now in Delphi 6, to see how it uses Trolltech's cross-platform Qt C++ class library. He starts by looking at what Qt is and why it was chosen as the basis for the CLX library, and then moves on to see how Qt has been integrated with the Object Pascal language.
Keywords	How CLX uses QT; Kylix; Linux; QT library; Widget sets; Linux user interface; X Windows; Trolltech; KDE desktop; Gnome and GTK widget set; VisualCLX; QT documentation; QTinterface library; libqt.so; Name mangling; Name decoration; libqtintf.so; Flat methods; Calling C++ classes; Flattened classes; CLXDisplay API; Qt.pas unit; Opaque references; Magic cookie, handle; QPushButton; TWidgetControl; Widget flags; SaveWidgetState; RestoreWidgetState; QT notification model; Windows messages; VCL message handlers; VCL events; X Windows events; MotionNotify; KeyPress KeyRelease; ButtonPress ButtonRelease; QT events; QT virtual methods; QEvent; QMouseEvent; QT signals and slots; CLX events; Linux signals; Hook objects; Hooking a QT signal; HookEvents; QWidget_hook; Event filters; MainEventFilter; Qt_hook_hook_events; installEventFilter; Custom events; QEventType; QEventType_ClxUser; QCustomEvent; QApplicarion_sendEvent; QT licensing

Beating The System: API-Level Programming With Kylix
Authors	Dave Jewell		Type: Article
Issue	70 : June 2001	View article	View source code
Summary	Dave Jewell says that the primary aim of this month's column is to widen our vision in terms of what Kylix can do for us. He demonstrates that Kylix will do a lot more than simply create CLX-based applications: it's equally well suited to writing efficient, easily deployable command-line utilities, barefoot X applications, or whatever. There's a whole new universe of APIs to explore here, so get stuck in!
Keywords	Beating the System; Linux API with Kylix; Kylix architecture; CLX; Qt library; Linux kernel; Kernel interrupt $80; syscall routine in libc.pas; libc.so.6; glibc2 glibc; GNU; dlopen; LD_LIBRARY_PATH; RTLD_LAZY; RTLD_NOW; Undefined symbols; RTLD_GLOBAL; CreateGUID; Creating processes; Managing processes; /proc directory; Linux system call; Fork; Blocking; pid process identifier; X Windows; xlib.pas; libqtintf.so; bplbaseclx; Xlib; X protocol; XCreateWindow; XOpenDisplay; XDefaultRootWindow; XMapWindow; XFlush; __sleep

Perspectives: Getting To Grips With Palm
Authors	Jim Cooper		Type: Article
Issue	70 : June 2001	View article	No source code
Summary	Jim Cooper is a Palm enthusiast and reveals that our Delphi skills are surprisingly handy when developing for these tiny machines. He starts by looking at PDAs in general, then at the major operating systems, before going on to examine what is involved in programming the little devils, and finally outlines what our Delphi experience can bring to the party, in the shape of PocketStudio from Pocket Technologies.
Keywords	Perspectives; Palm palmtop computer; Personal digital assistant; PDA; WinCE Windows CE; Palm versus PocketPC; PalmOS; Graffiti; Handwriting recognition; EPOC Psion; Handspring Visor; Sony Clie; Synchronise Palm and PC; Delphi and Palm; HotSync conduits; Ehand conduit ActiveX; Conduit development kit; Delphi conduit components; Writing Palm applications; Palm applications in Delphi; PocketStudio; Palm OS emulator POSE

Algorithms Alfresco: Gilding Pale Streams
Authors	Julian Bucknall		Type: Article
Issue	70 : June 2001	View article	View source code
Summary	Julian Bucknall extends the TStream class in a variety of interesting and useful ways, adding a variety of filters for debugging, regex handling, encryption and more.
Keywords	Algorithms Alfresco; Extending TStream; Streams; File streams; Filter streams; TStream descendants; Read-only filter stream; Buffering filter streams; Bufferred TFileStream; Text filter stream; Parse text into lines; Debug filter stream; Regex filter stream; Regular expressions; Pattern matching; Regular expression bug; Encryption filter stream; Window filter stream; Multiple views of stream

One Last Compile...
Authors			Type: Article
Issue	70 : June 2001	View article	No source code
Summary	The Joy Of TClientDataSet.
Keywords	One last compile...

Review: CodeSite 2.0 Professional
Authors	Dave Jewell		Type: Review
Issue	70 : June 2001	View article	No source code
Summary	Dave Jewell checks out the new version of Raize Software's debugging aid.
Keywords	CodeSite 2.0 Professional; Review; Raize Components; Ray Konopka; Debugging tools; Diagnostic messages

Review: SQL Tester
Authors	Richard Stevens		Type: Review
Issue	70 : June 2001	View article	No source code
Summary	Richard Stevens examines Red Brook Software's SQL testing utility.
Keywords	SQL Tester; Review; Red Brook Software; Testing SQL statements; BDE, MDAC

Error Starting Kylix
Authors	Brian Long		Type: Clinic
Issue	70 : June 2001	View article	View source code
Summary	Error Starting Kylix
Keywords	Error starting Kylix; Runtime error 230 Kylix; JPEG library compilation; startkylix script; JPEG error #21; jpeglib.h; D_MAX_BLOCKS_IN_MCU; JPEG decompressor; JPG files

Linux Equivalents Of Win32 APIs
Authors	Brian Long		Type: Clinic
Issue	70 : June 2001	View article	View source code
Summary	Linux Equivalents Of Win32 APIs
Keywords	Linux API; Translate Delphi to Kylix; Windows API Linux; Translated Win32 API calls; getlogin security problem; LOGNAME; GetEnvironmentVariable Kylix; getuid get user ID; getpwuid; Do not use cuserid; geteuid; OutputDebugString Kylix; syslog Linux system logging; varargs directive; Variable number of arguments

Dynamically Choosing COM Objects
Authors	Brian Long		Type: Clinic
Issue	70 : June 2001	View article	View source code
Summary	Dynamically Choosing COM Objects
Keywords	Choosing COM objects; Select COM object at runtime; ClassID coclass identifier; Dynamically loading ActiveX; Register ActiveX; DllGetClassObject

Type Library Editor Quirk
Authors	Brian Long		Type: Clinic
Issue	70 : June 2001	View article	View source code
Summary	Type Library Editor Quirk
Keywords	Type library editor; Underscores on interfaces; Identifier clashes; Tlibimp.sym; Remapping type library names

Stack-Based Objects In Delphi
Authors	Pedro Agull≤ Soliveres		Type: Article
Issue	71 : July 2001	View article	View source code
Summary	Pedro Agull≤ Soliveres demonstrates techniques to optimise object construction and destruction.
Keywords	Stack-based objects; Performance of small objects; Construction small objects; Destruction small objects; GetMem; Optimisation; Initialise VMT pointers; Memory allocation speed; Allocating objects on stack; NewInstance; InitInstance; AfterConstruction; BeforeConstruction; EOutOfMemory; FreeMem; FreeInstance; Stack-based construction; Fast object construction; $A compiler directive; Aligned record fields; InstanceSize; Data alignment

Algorithms Alfresco: Distribution And Radix Sorts
Authors	Julian Bucknall		Type: Article
Issue	71 : July 2001	View article	View source code
Summary	Julian Bucknall explains the mysteries of these sorting algorithms that don't use key comparisons to do their work: how they accomplish their tasks and when they will be of best use.
Keywords	Algorithms Alfresco; Distribution sort; Radix sort; Sorting algorithms; Key comparisons; Sort with no key comparison; Performance; Counting sort; Stability of sort; Stable sort; MSD radix sorting; Most significant digit; Insertion sort; LSD radix sort; Least significant digit; Choosing sorting algorithm

Delphi Meets C# Via COM
Authors	Craig Murphy		Type: Article
Issue	71 : July 2001	View article	View source code
Summary	Craig Murphy explains how Delphi can meet the C# language with a little help from COM. With the release of the .NET platform, Microsoft is making C# its language of choice. However, as interoperabilty is becoming more and more important, it is possible to use C# objects in Delphi and vice versa. Craig demonstrates how to use C# and Delphi together and why you may want to.
Keywords	C# language; Using C# with Delphi; .NET framework; ECMA standards; .NET interoperability; Delphi objects with C#; MISL, IL; CLR; Common language runtime; CLS language specification; Managed code; Creating c# object; COM components; COM callable wrapper; Proxy object; Shared name; Digital signature; Global assembly cache; .NET assemblies; Assembly versioning; IL disassembler; regasm.exe type library tool; Runtime callable wrapper RCW; Visual Studio .NET; .NET metadata

Under Construction: Kylix Desktop Does CGI Too
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	71 : July 2001	View article	View source code
Summary	Bob Swart shows how to create web server applications using just the Desktop version of Kylix (which has just been dramatically reduced in price!), including using dbExpress to develop database web applications.
Keywords	Under Construction; Kylix; Linux; CGI applications; CGI with Kylix Desktop; Kylix console applications; Apache web server; Web applications; Internet; HTML content-type; text/html; Command line compiler; LD_LIBRARY_PATH; kylixpath script; httpd.conf; REQUEST_METHOD; CONTENT_LENGTH; CGI variables; QUERY_STRING; HTTP_COOKIE; REMOTE_ADDR; SCRIPT_NAME; HTTP_USER_AGENT; PATH_INFO; Environment variables; HTML form variables; CGI unit; GetEnvironmentStrings; Cookies; dbExpress database; Interbase in CGI; TSQLDataSet; TSQLConnection; CLX; Generating HTML; Unidirectional dataset; Cursor; SysUtils.StrToIntDef; Dataset navigation

One Last Compile...
Authors			Type: Article
Issue	71 : July 2001	View article	No source code
Summary	More Joy Of TClientDataSets.
Keywords	One last compile...

ADO.NET Explored
Authors	Guy Smith-Ferrier		Type: Article
Issue	71 : July 2001	View article	View source code
Summary	Guy Smith-Ferrier explains the successor to ADO and shows how to make full use of Microsoft's latest database access technology in Delphi.
Keywords	ADO.NET; .NET framework; Visual Studio .NET Beta 1; XML; ADO+; Remote data services RDS; COM marshaling; COM calls and firewalls; OLEDB classes; Tabular data stream TDS; Regasm.exe utility; Com wrapper for .NET; COMSystemData.dll; System.data assembly; CreateCOMObject; SQLConnection; SQLCommand; SQL Server; DataReader; Read-only cursor; Unidirectional cursor; Firehose cursor; DataSetCommand; oWorkAround; DataAdapter; In-memory database; .NET COM interop layer; DataRelation; Writing ADO.NET data; Import export XML; WriteDiffGram

Beating The System: Windows XP
Authors	Dave Jewell		Type: Article
Issue	71 : July 2001	View article	No source code
Summary	On Windows XP Dave Jewell has been checking out what the newest version of the Microsoft operating system we all know and love has in store for the folks at the sharp end: developers creating applications for the platform! Keep ahead of the game with Dave's overview.
Keywords	Beating the System; Windows XP; Roxio, Adaptec; CD-R, CD-RW; Visual themes; Window client area; Window non-client area; Comctl32.dll Windows XP; Comctl32 version 6; Non-rectangular windows; Shaped windows; Window transparency effects; Alpha-blending; GDI+; Uxtheme.dll; GetThemeFont; GetThemeMetric; Switching Windows users; Fast user switching; Session switching; Fusion; Side-by-side DLL technology; System file protection SFP; DLL hell; Shared DLL problems; Application manifest; .NET metadata; User experience controls; RT_MANIFEST resource; publicKeyToken; WinSxS; WM_WTSESSION_CHANGE; Remote connects

What's New In Delphi 6?
Authors	Brian Long		Type: Review
Issue	71 : July 2001	View article	View source code
Summary	Brian Long kicks off our in-depth Delphi 6 review double-act with a tour of all that's new in the latest incarnation: what is it, what do you do with it, and is it any good?
Keywords	Delphi 6 overview; Review; Delphi 6 features; BizSnap; SOAP and XML; Web Services; IInvokable; THTTPSoapDispatcher; THTTPSoapPascalInvoker; TWSDLHTMLPublish; WSDL; TXMLDocument; XML document manipulation; XML data binding wizard; XML DOM level 2 parser; XML parsers; XML transformation; WebSnap; Apache web server Windows; SiteExpress; Server-side scripting; ActiveScript languages; Adapter components; TDataSetAdapter; XSL; Web application wizard; Web application debugging; Web app debugger; DataSnap; MIDAS; TSoapConnection; Soap Server data module; ConnectionBroker; TLocalConnection; CORBA; Delphi 6 IDE; Data module designer; Object treeview; Surface designers; Code completion; Docking; Delphi 6 compiler changes; Enumerated types; Writeable typed constants; $WRITEABLECONST; Disable writeable constants; Library directive; Platform directive; $WARN compiler directive; Hint directives; Disable compiler warnings; Variable number of arguments; MSWINDOWS symbol; $MESSAGE compiler directive; $LIBVERSION; $LIBSUFFIX; $LIBPREFIX; $SetPEFlags; PE file header; $SetPEOpt; DLLCharacteristics; CONDITIONALEXPRESSIONS; CHASM inline assembler; COM+; dbExpress; Actions; Custom variants; ConvUtils conversion; Conversion routines; Euro conversion; Shell controls; Windows shell; Internationalisation; Translation tools; External translation manager

Delphi 6: A Cross-Platform Development Perspective
Authors	Dave Jewell		Type: Review
Issue	71 : July 2001	View article	No source code
Summary	Dave Jewell takes up the reins from Brian to examine the cross-platform aspects of Delphi 6: specifically, the new CLX framework, built on the Qt library, and what performance and deployment issues it raises for Windows developers (hint: there may be some surprises!)
Keywords	Delphi 6 cross-platform; Cross-platform development; Delphi 6 and Kylix; CLX; Linux and Windows; Qt library; Deployment of CLX apps; Qtintf.dll; libqtintf.so; Depends.exe; DLL dependency; Qtintf load address; CLX performance versus VCL; QT 3.0; QueryPerformanceCounter; QueryPerformanceFrequency; SetThreadPriority; Qt performance on Windows

Missing Debugger Windows
Authors	Brian Long		Type: Clinic
Issue	71 : July 2001	View article	View source code
Summary	Missing Debugger Windows
Keywords	Debugger windows; Customise Delphi IDE; Editing desktop file; Retrieve lost windows

SDF Files
Authors	Brian Long		Type: Clinic
Issue	71 : July 2001	View article	View source code
Summary	SDF Files
Keywords	Reading SDF files; TStrings; System Data Format

RTTI To The Rescue
Authors	Brian Long		Type: Clinic
Issue	71 : July 2001	View article	View source code
Summary	RTTI To The Rescue
Keywords	RTTI; Resource strings; Does component have caption; Typinfo unit; IsPublishedProp; GetStrProp

Type Libraries And COM Parameters
Authors	Brian Long		Type: Clinic
Issue	71 : July 2001	View article	View source code
Summary	Type Libraries And COM Parameters
Keywords	Type libraries; OLE streams; OLEStream; Interface not accessible; COM programming; IStream, IUnknown

Hiding From The Windows 95/98/Me Task Manager
Authors	Brian Long		Type: Clinic
Issue	71 : July 2001	View article	View source code
Summary	Hiding From The Windows 95/98/Me Task Manager
Keywords	Hiding from task manager; Windows task manager; Windows services; Pseudo-services; RegisterServiceProcess; Simple service application; WM_ENDSESSION; Application.Terminated; ENDSESSION_LOGOFF; HookMainWindow; Window hook; Surviving a user logoff

Problems With Packages
Authors	Brian Long		Type: Clinic
Issue	71 : July 2001	View article	View source code
Summary	Problems With Packages
Keywords	Packages; Recompiling packages

Update (RTTI and Interfaces)
Authors	Brian Long		Type: Clinic
Issue	71 : July 2001	View article	View source code
Summary	Update (RTTI and Interfaces)
Keywords	RTTI and interfaces

Preparing For A Terminal Server Environment
Authors	Jani Jarvinen		Type: Article
Issue	72 : August 2001	View article	View source code
Summary	Jani JΣrvinen describes how you should prepare your software to work with Microsoft Terminal Services, the remote access system which allows running of applications on the server, only transferring the user interface to the client. A smooth user experience needs special awareness from the software developer: Jani tells us all how to deliver that smooth user experience!
Keywords	Windows terminal services; Multi-user; Multiple desktops; Remote administration; Remote operation; Multiple users; Citrix MetaFrame; Multi-user Windows kernel; Terminal server; TEMP environment variable; HKEY_CURRENT_USER; Registry settings; HKEY_LOCAL_MACHINE; Terminal Services API; WTSEnumerateSessions; WTSAPI32.H; Platform SDK; WTS_CURRENT_SERVER_HANDLE; SM_REMOTESESSION; GetSystemMetrics; Session information; ProcessIDtoSessionID; Process ID, Session ID; WTSFreeMemory

Under Construction: Delphi 6 Web Services: SOAP
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	72 : August 2001	View article	View source code
Summary	Web Services is very much the buzz phrase of today and this month Bob Swart shows how to use the new SOAP capabilities of Delphi 6 to create your very own Web Services as easy as pie.
Keywords	Under Construction; Delphi 6 features; Web Services; SOAP; XML; BizSnap; Distributed applications; WSDL; SOAP server application; TWSDLHTMLPublish; THHTPSOAPDispatcher; IInvokable interface; InvokeRegistry; stdcall calling convention; Consuming web services; Calling web services; HTTPRIO component; Remote invokable object; WSDLLocation

Hackers 101
Authors	Jason Southwell		Type: Article
Issue	72 : August 2001	View article	No source code
Summary	Jason Southwell discusses web security: how to write applications that react appropriately to hacker attacks. He explains how a hacker tries to take control of your code and how to write code in your apps to block these attacks.
Keywords	Hacking; Software security; Security procedures; Creating secure software; Preventing hacking; Packet sniffing; TCP/IP packets; Data sniffing; Natas sniffing tool; Cracking passwords; Social engineering; SSL secure socket layer; Virtual private network; Encryption algorithms; Web page expiration; HTML expires; Browser back button; Expires meta tag; Buffer overrun; Web applications; Internet; EIP register

Algorithms Alfresco: Squeeze, Please
Authors	Julian Bucknall		Type: Article
Issue	72 : August 2001	View article	View source code
Summary	Julian Bucknall returns to the subject of data compression with a new technique which makes use of the rather ingenious Burrows-Wheeler transform to get extra performance out of Huffman encoding.
Keywords	Algorithms Alfresco; Data compression; Burrows-Wheeler transform; Huffman encoding; Deflate algorithm, Deflate64; Huffman tree; NP-complete problem; Block transform; LX77, Zip; Move-to-front algorithm; Move to front algorithm; Jon Bentley; Decompression

Dynamic Web Images With Kylix
Authors	Bob Swart (aka Dr.Bob)		Type: Article
Issue	72 : August 2001	View article	View source code
Summary	Bob Swart shows how to create images on the fly from databases in Kylix CGI applications using Kylix Desktop.
Keywords	Dynamic web images; Kylix desktop developer; Web applications; Internet; Linux; Apache web server; Generating dynamic images; Blob fields; TGraphicField.AsString; Binary data; BMP bitmap format; Netscape and BMP bitmaps; Biolife table images; Converting BMP to JPEG JPG; CGI applications

One Last Compile...
Authors			Type: Article
Issue	72 : August 2001	View article	No source code
Summary	Bad news from DCon
Keywords	One last compile...

Beating The System: Strings Unstrung
Authors	Dave Jewell		Type: Article
Issue	72 : August 2001	View article	No source code
Summary	Dave Jewell wants to put strings to bed: specifically how Delphi implements long strings and the ramifications of this for your own code.
Keywords	Beating the System; String types; AnsiString; ShortString; Pascal string type; Allocating string data; String initialisation; String finalisation; InstanceSize; DCUExplorer; Disassemble DCU files; Local and global scope; AnsiString implementation; String function results; Passing string arguments; UniqueString; @LstrClr; SafeGuards; JEDI code library

Perspectives: Microsoft TechEd 2001
Authors	Chris Frizelle		Type: Article
Issue	72 : August 2001	View article	No source code
Summary	Chris Frizelle reports back from Microsoft's annual techno-bash. This year your intrepid Editor braved squid and octopus by the bucket-load in sunny Barcelona to bring you the latest on what is setting hearts a-flutter back in Redmond at MS HQ.
Keywords	Perpsectives; Microsoft TechEd Europe 2001; .NET; XML; SOAP; Web Services; WSDL, UDDI; Visual Studio .NET; C# language; ASP.NET; MSF; Solutions framework

Titanium 2.0
Authors	Dave Jewell		Type: Review
Issue	72 : August 2001	View article	No source code
Summary	Dave Jewell checks out this new software security package from BitArts: is it truly uncrackable, will it genuinely increase your software sales revenues? Dave has the answers.
Keywords	Titanium 2.0; Review; BitArts; Software security; Software protection; Piracy; Encryption; EXE wrapper; Authentication; Mutation engine; Selling software; Secure transactions

GExperts 1.0
Authors	Primoz Gabrijelcic		Type: Review
Issue	72 : August 2001	View article	No source code
Summary	Primoz Gabrijelcic evaluates this freeware package of add-in experts for Delphi to see if it really will make your development work easier and smoother.
Keywords	GExperts 1.0; Review; Delphi IDE experts; Gerald Nunn; Erik B Berry; Generating experts

Bug With Global Variables?
Authors	Brian Long		Type: Clinic
Issue	72 : August 2001	View article	View source code
Summary	Bug With Global Variables?
Keywords	Global variables; Variable initialisation; Local variables

Record Property Issues
Authors	Brian Long		Type: Clinic
Issue	72 : August 2001	View article	View source code
Summary	Record Property Issues
Keywords	Record properties; Assign to record properties; Updating record properties; Record property

Delphi ToolBar Problem
Authors	Brian Long		Type: Clinic
Issue	72 : August 2001	View article	View source code
Summary	Delphi ToolBar Problem
Keywords	Delphi IDE toolbar problem; Delphi 5; IDE loses toolbar custom; Lost toolbar customisation; Save IDE toolbar status; Registry

AVs When Destroying Components
Authors	Brian Long		Type: Clinic
Issue	72 : August 2001	View article	View source code
Summary
Keywords	Destroying components; Access violation; Free or Destroy

Word Automation Query
Authors	Brian Long		Type: Clinic
Issue	72 : August 2001	View article	View source code
Summary	Word Automation Query
Keywords	Microsoft Word automation; Insert Tab character; Automation servers

Reading Excel Spreadsheets
Authors	Brian Long		Type: Clinic
Issue	72 : August 2001	View article	View source code
Summary	Reading Excel Spreadsheets
Keywords	Reading Excel spreadhseet; Automation; TExcelApplication; Member not found error; VBA; Visual Basic; TExcelWorksheet

Updates
Authors	Brian Long		Type: Clinic
Issue	72 : August 2001	View article	View source code
Summary	Updates
Keywords	Updates; MoveFileEx; MoveFile_Delay_UntilReboot; Windows NT; Sending email; MAPI; TNMSMTP