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comuser.cpp
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/*+==========================================================================
File: COMUSER.CPP
Summary: Based largely on the DLLUSER.EXE application code, this
module is meant to implicitly link to the COMOBJ.DLL
and illustrate the use (by this COMUSER client app) of the
exported COM Object creation calls from that DLL:
CreateCar, CreateUtilityCar, CreateCruiseCar.
To this end, COMUSER also provides a set of menus for these
Car related objects with selections for the respective
methods of the Interfaces exposed by those COM Objects.
For a comprehensive tutorial code tour of COMUSER's contents
and offerings see the tutorial COMUSER.HTM file. For more
specific technical details on the internal workings see the
comments dispersed throughout the COMUSER source code. For
more details on the COMOBJ.DLL that COMUSER works with see
the COMOBJ.HTM tutorial file in the main tutorial directory.
Classes: CMainWindow
Functions: InitApplication, WinMain
Origin: 8-20-95: atrent - Editor-inheritance from the DLLUSER source.
----------------------------------------------------------------------------
This file is part of the Microsoft COM Tutorial Code Samples.
Copyright (C) Microsoft Corporation, 1997. All rights reserved.
This source code is intended only as a supplement to Microsoft
Development Tools and/or on-line documentation. See these other
materials for detailed information regarding Microsoft code samples.
THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
PARTICULAR PURPOSE.
==========================================================================+*/
/*--------------------------------------------------------------------------
We include WINDOWS.H for all Win32 applications.
We include OLE2.H because we will make calls to the COM/OLE libraries.
We include INITGUID.H only once (here) in the entire app because we
will be defining GUIDs and want them as constants in the data segment.
We include COMMDLG.H because we will be using the Open File and
potentially other Common dialogs.
We include APPUTIL.H because we will be building this application using
the convenient Virtual Window and Dialog classes and other
utility functions in the APPUTIL Library (ie, APPUTIL.LIB).
We include ICARS.H and CARGUIDS.H for the common car-related Interface
class, GUID, and CLSID specifications.
We include COMOBJ.H for the interface declarations and the import
prototypes for the service functions provided by COMOBJ.DLL.
We include COMUSER.H because it has class and resource definitions
specific to this COMUSER application.
---------------------------------------------------------------------------*/
#include <windows.h>
#include <ole2.h>
#include <initguid.h>
#include <commdlg.h>
#include <apputil.h>
#include <icars.h>
#include <carguids.h>
#include <comobj.h>
#include "comuser.h"
#include "utcrucar.h"
// Here is a pointer for use by the global Trace Message logging macros.
CMsgLog* g_pMsgLog = NULL;
/*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
Method: CMainWindow::CMainWindow
Summary: CMainWindow Constructor.
Args: .
Modifies: .
Returns: .
M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
CMainWindow::CMainWindow()
{
// Ensure these member variable strings are null strings.
m_szFileName[0] = 0;
m_szFileTitle[0] = 0;
// Fill in the Open File Name Common Dialog's OPENFILENAME structure.
m_ofnFile.lStructSize = sizeof(OPENFILENAME);
m_ofnFile.hwndOwner = m_hWnd;
m_ofnFile.hInstance = m_hInst;
m_ofnFile.lpstrFilter = TEXT(OFN_DEFAULTFILES_STR);
m_ofnFile.lpstrCustomFilter = NULL;
m_ofnFile.nMaxCustFilter = 0;
m_ofnFile.nFilterIndex = 1;
m_ofnFile.lpstrFile = m_szFileName;
m_ofnFile.nMaxFile = MAX_PATH;
m_ofnFile.lpstrInitialDir = TEXT(".");
m_ofnFile.lpstrFileTitle = m_szFileTitle;
m_ofnFile.nMaxFileTitle = MAX_PATH;
m_ofnFile.lpstrTitle = TEXT(OFN_DEFAULTTITLE_STR);
m_ofnFile.lpstrDefExt = NULL;
m_ofnFile.Flags = OFN_HIDEREADONLY;
// Null the COM Object IUnknown pointers.
m_pCar = NULL;
m_pUtilityCar = NULL;
m_pCruiseCar = NULL;
m_pUtilityCruiseCar = NULL;
// Null the Message object pointers.
m_pMsgBox = NULL;
m_pMsgLog = NULL;
}
/*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
Method: CMainWindow::~CMainWindow
Summary: CMainWindow Destructor. Destruction of the main window
indicates that the application should quit and thus the
PostQuitMessage API is called.
Args: .
Modifies: .
Returns: .
M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
CMainWindow::~CMainWindow()
{
// CMainWindow is derived from CVirWindow which traps the WM_DESTROY
// message and causes a delete of CMainWindow which in turn causes this
// destructor to run. The WM_DESTROY results when the window is destoyed
// after a close of the window. Prior to exiting the main message loop:
// We release any and all of the pointers to instantiated COM objects.
RELEASE_INTERFACE(m_pCar);
RELEASE_INTERFACE(m_pUtilityCar);
RELEASE_INTERFACE(m_pCruiseCar);
RELEASE_INTERFACE(m_pUtilityCruiseCar);
// We delete the CMsgBox and CMsgLog objects that were made in
// Initinstance.
DELETE_POINTER(m_pMsgBox);
DELETE_POINTER(m_pMsgLog);
// We then post a WM_QUIT message to cause an exit of the main thread's
// message loop and an exit of this instance of the application.
PostQuitMessage(0);
}
/*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
Method: CMainWindow::InitInstance
Summary: Instantiates an instance of the main application window.
This method must be called only once, immediately after
window class construction. We take care to delete 'this'
CMainWindow if we must return the error condition FALSE.
Args: HINSTANCE hInstance,
Handle of the application instance.
int nCmdShow)
Command to pass to ShowWindow.
Modifies: m_szHelpFile, m_pMsgBox, m_pMsgLog.
Returns: BOOL.
TRUE if succeeded.
FALSE if failed.
M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
BOOL CMainWindow::InitInstance(
HINSTANCE hInstance,
int nCmdShow)
{
BOOL bResult = FALSE;
HWND hWnd;
// Create the Message Box and Message Log objects.
m_pMsgBox = new CMsgBox;
m_pMsgLog = new CMsgLog;
if (NULL != m_pMsgBox && NULL != m_pMsgLog)
{
// Note, the Create method sets the m_hWnd member so we don't
// need to set it explicitly here first.
// Here is the create of this window. Size the window reasonably.
// Create sets both m_hInst and m_hWnd.
hWnd = Create(
TEXT(MAIN_WINDOW_CLASS_NAME_STR),
TEXT(MAIN_WINDOW_TITLE_STR),
WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX
| WS_MAXIMIZEBOX | WS_THICKFRAME,
CW_USEDEFAULT,
CW_USEDEFAULT,
::GetSystemMetrics(SM_CXSCREEN)*3/5,
::GetSystemMetrics(SM_CYSCREEN)*3/5,
NULL,
NULL,
hInstance);
if (hWnd)
{
// Ensure the new window is shown on screen and its content is painted.
::ShowWindow(m_hWnd, nCmdShow);
::UpdateWindow(m_hWnd);
// Build a path to where the help file should be (it should be in
// the same directory as the .EXE but with the .HTM extension.
MakeFamilyPath(hInstance, m_szHelpFile, TEXT(HELP_FILE_EXT));
// Init the Message Box object.
if (m_pMsgBox->Init(m_hInst, m_hWnd))
{
// Create the Trace Message Log ListBox as a child window that
// fits the client area of the Main Window (the TRUE 3rd argument
// specifies such an inside child).
// If you want the Trace Message Log in a separate (but owned)
// window, then pass a FALSE instead for the 3rd argument.
if (m_pMsgLog->Create(m_hInst, m_hWnd, TRUE))
{
// Assign the global MsgLog pointer.
g_pMsgLog = m_pMsgLog;
// Use macro to log an initial start messsage.
LOGID(IDS_START_MESSAGE_LOG);
// Since we're exploiting the COMOBJ DLL and we want it to use
// this same Message Log facility, we pass it a pointer to our
// particular instance's CMsgLog object.
ComObjInitMsgLog(g_pMsgLog);
// Signal that we succeeded in initializing the app.
bResult = TRUE;
}
}
}
}
if (!bResult)
{
DELETE_POINTER(m_pMsgBox);
DELETE_POINTER(m_pMsgLog);
}
return (bResult);
}
/*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
Method: CMainWindow::GetInterface
Summary: Convenience method that wraps the QueryInterface call
and accepts a main COM object IUnknown pointer as an argument.
Args: IUnknown* pObj,
Pointer to the COM Object we are getting an interface on.
REFIID riid,
The GUID for the interface that we are seeking.
PPVOID ppv);
Address of the caller's pointer variable that will
receive the requested interface pointer.
Modifies: .
Returns: BOOL.
TRUE if succeeded.
FALSE if failed.
M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
BOOL CMainWindow::GetInterface(
IUnknown* pObj,
REFIID riid,
PPVOID ppv)
{
BOOL bResult = FALSE;
HRESULT hr;
*ppv=NULL;
if (NULL != pObj)
{
LOG("E: --Obtaining Interface Pointer.");
hr=pObj->QueryInterface(riid, ppv);
if (FAILED(hr))
{
LOGERROR("C: ???? QueryInterface", hr);
}
else
{
LOGF1("E: Interface obtained. *ppv=0x%X", *ppv);
bResult = TRUE;
}
}
else
{
LOG("E: ???? Create an object first.");
}
return (bResult);
}
/*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
Method: CMainWindow::DoMenu
Summary: Dispatch and handle the main menu commands.
Args: WPARAM wParam,
First message parameter (word sized).
LPARAM lParam)
Second message parameter (long sized).
Modifies: m_ofnFile, ...
Returns: LRESULT
Standard Windows WindowProc return value.
M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
LRESULT CMainWindow::DoMenu(
WPARAM wParam,
LPARAM lParam)
{
LRESULT lResult = FALSE;
HRESULT hr;
HMENU hMenu = ::GetMenu(m_hWnd);
// Here are some interface pointers used to call methods on
// our COUtilityCar, COCruiseCar, and COUtilityCruiseCar COM objects.
ICar* pICar;
IUtility* pIUtility;
ICruise* pICruise;
switch (LOWORD(wParam))
{
//----------------------------------------------------------------------
// Handle File Menu Commands.
//----------------------------------------------------------------------
case IDM_FILE_EXIT:
// The user commands us to exit this application so we tell the
// Main window to close itself.
::PostMessage(m_hWnd, WM_CLOSE, 0, 0);
break;
//----------------------------------------------------------------------
// Handle Car Menu Commands.
//----------------------------------------------------------------------
case IDM_CAR_CREATE:
LOG("E: === Car Menu: Create.");
if (NULL == m_pCar)
{
hr = CreateCar(NULL, IID_IUnknown, (PPVOID)&m_pCar);
if (SUCCEEDED(hr))
{
::CheckMenuItem(
hMenu,
IDM_CAR_CREATE,
MF_BYCOMMAND | MF_CHECKED);
}
else
LOG("C: ???? Car creation failed.");
}
else
LOG("E: ???? Car already exists.");
break;
case IDM_CAR_RELEASE:
LOG("E: === Car Menu: Release.");
if (NULL != m_pCar)
{
RELEASE_INTERFACE(m_pCar);
::CheckMenuItem(
hMenu,
IDM_CAR_CREATE,
MF_BYCOMMAND | MF_UNCHECKED);
}
else
LOG("E: ???? No Car to Release.");
break;
case IDM_CAR_SHIFT:
LOG("E: === Car Menu: ICar::Shift");
if (GetInterface(m_pCar, IID_ICar, (PPVOID)&pICar))
{
LOG("E: --Calling pICar->Shift");
pICar->Shift(1);
LOG("E: --Releasing pICar");
pICar->Release();
}
break;
case IDM_CAR_CLUTCH:
LOG("E: === Car Menu: ICar::Clutch");
if (GetInterface(m_pCar, IID_ICar, (PPVOID)&pICar))
{
LOG("E: --Calling pICar->Clutch");
pICar->Clutch(100);
LOG("E: --Releasing pICar");
pICar->Release();
}
break;
case IDM_CAR_SPEED:
LOG("E: === Car Menu: ICar::Speed");
if (GetInterface(m_pCar, IID_ICar, (PPVOID)&pICar))
{
LOG("E: --Calling pICar->Speed");
pICar->Speed(20);
LOG("E: --Releasing pICar");
pICar->Release();
}
break;
case IDM_CAR_STEER:
LOG("E: === Car Menu: ICar::Steer");
if (GetInterface(m_pCar, IID_ICar, (PPVOID)&pICar))
{
LOG("E: --Calling pICar->Steer");
pICar->Steer(0);
LOG("E: --Releasing pICar");
pICar->Release();
}
break;
//----------------------------------------------------------------------
// Handle UtilityCar Menu Commands.
//----------------------------------------------------------------------
case IDM_UCAR_CREATE:
LOG("E: === UtilityCar Menu: Create.");
if (NULL == m_pUtilityCar)
{
hr = CreateUtilityCar(NULL, IID_IUnknown, (PPVOID)&m_pUtilityCar);
if (SUCCEEDED(hr))
{
::CheckMenuItem(
hMenu,
IDM_UCAR_CREATE,
MF_BYCOMMAND | MF_CHECKED);
}
else
LOG("C: ???? UtilityCar creation failed.");
}
else
LOG("E: ???? UtilityCar already exists.");
break;
case IDM_UCAR_RELEASE:
LOG("E: === UtilityCar Menu: Release.");
if (NULL != m_pUtilityCar)
{
RELEASE_INTERFACE(m_pUtilityCar);
::CheckMenuItem(
hMenu,
IDM_UCAR_CREATE,
MF_BYCOMMAND | MF_UNCHECKED);
}
else
LOG("E: ???? No UtilityCar to Release.");
break;
case IDM_UCAR_SHIFT:
LOG("E: === UtilityCar Menu: ICar::Shift");
if (GetInterface(m_pUtilityCar, IID_ICar, (PPVOID)&pICar))
{
LOG("E: --Calling pICar->Shift");
pICar->Shift(2);
LOG("E: --Releasing pICar");
pICar->Release();
}
break;
case IDM_UCAR_CLUTCH:
LOG("E: === UtilityCar Menu: ICar::Clutch");
if (GetInterface(m_pUtilityCar, IID_ICar, (PPVOID)&pICar))
{
LOG("E: --Calling pICar->Clutch");
pICar->Clutch(100);
LOG("E: --Releasing pICar");
pICar->Release();
}
break;
case IDM_UCAR_SPEED:
LOG("E: === UtilityCar Menu: ICar::Speed");
if (GetInterface(m_pUtilityCar, IID_ICar, (PPVOID)&pICar))
{
LOG("E: --Calling pICar->Speed");
pICar->Speed(30);
LOG("E: --Releasing pICar");
pICar->Release();
}
break;
case IDM_UCAR_STEER:
LOG("E: === UtilityCar Menu: ICar::Steer");
if (GetInterface(m_pUtilityCar, IID_ICar, (PPVOID)&pICar))
{
LOG("E: --Calling pICar->Steer");
pICar->Steer(10);
LOG("E: --Releasing pICar");
pICar->Release();
}
break;
case IDM_UCAR_OFFROAD:
LOG("E: === UtilityCar Menu: IUtility::Offroad");
if (GetInterface(m_pUtilityCar, IID_IUtility, (PPVOID)&pIUtility))
{
LOG("E: --Calling pIUtility->Offroad");
pIUtility->Offroad(1);
LOG("E: --Releasing pIUtility");
pIUtility->Release();
}
break;
case IDM_UCAR_WINCH:
LOG("E: === UtilityCar Menu: IUtility::Winch");
if (GetInterface(m_pUtilityCar, IID_IUtility, (PPVOID)&pIUtility))
{
LOG("E: --Calling pIUtility->Winch");
pIUtility->Winch(0);
LOG("E: --Releasing pIUtility");
pIUtility->Release();
}
break;
//----------------------------------------------------------------------
// Handle CruiseCar Menu Commands.
//----------------------------------------------------------------------
case IDM_CCAR_CREATE:
LOG("E: === CruiseCar Menu: Create.");
if (NULL == m_pCruiseCar)
{
hr = CreateCruiseCar(NULL, IID_IUnknown, (PPVOID)&m_pCruiseCar);
if (SUCCEEDED(hr))
{
::CheckMenuItem(
hMenu,
IDM_CCAR_CREATE,
MF_BYCOMMAND | MF_CHECKED);
}
else
LOG("C: ???? CruiseCar creation failed.");
}
else
LOG("E: ???? CruiseCar already exists.");
break;
case IDM_CCAR_RELEASE:
LOG("E: === CruiseCar Menu: Release.");
if (NULL != m_pCruiseCar)
{
RELEASE_INTERFACE(m_pCruiseCar);
::CheckMenuItem(
hMenu,
IDM_CCAR_CREATE,
MF_BYCOMMAND | MF_UNCHECKED);
}
else
LOG("E: ???? No CruiseCar to Release.");
break;
case IDM_CCAR_SHIFT:
LOG("E: === CruiseCar Menu: ICar::Shift");
if (GetInterface(m_pCruiseCar, IID_ICar, (PPVOID)&pICar))
{
LOG("E: --Calling pICar->Shift");
pICar->Shift(4);
LOG("E: --Releasing pICar");
pICar->Release();
}
break;
case IDM_CCAR_CLUTCH:
LOG("E: === CruiseCar Menu: ICar::Clutch");
if (GetInterface(m_pCruiseCar, IID_ICar, (PPVOID)&pICar))
{
LOG("E: --Calling pICar->Clutch");
pICar->Clutch(100);
LOG("E: --Releasing pICar");
pICar->Release();
}
break;
case IDM_CCAR_SPEED:
LOG("E: === CruiseCar Menu: ICar::Speed");
if (GetInterface(m_pCruiseCar, IID_ICar, (PPVOID)&pICar))
{
LOG("E: --Calling pICar->Speed");
pICar->Speed(60);
LOG("E: --Releasing pICar");
pICar->Release();
}
break;
case IDM_CCAR_STEER:
LOG("E: === CruiseCar Menu: ICar::Steer");
if (GetInterface(m_pCruiseCar, IID_ICar, (PPVOID)&pICar))
{
LOG("E: --Calling pICar->Steer");
pICar->Steer(0);
LOG("E: --Releasing pICar");
pICar->Release();
}
break;
case IDM_CCAR_ENGAGE:
LOG("E: === CruiseCar Menu: ICruise::Engage");
if (GetInterface(m_pCruiseCar, IID_ICruise, (PPVOID)&pICruise))
{
LOG("E: --Calling pICruise->Engage");
pICruise->Engage(TRUE);
LOG("E: --Releasing pICruise");
pICruise->Release();
}
break;
case IDM_CCAR_ADJUST:
LOG("E: === CruiseCar Menu: ICruise::Adjust");
if (GetInterface(m_pCruiseCar, IID_ICruise, (PPVOID)&pICruise))
{
LOG("E: --Calling pICruise->Adjust");
pICruise->Adjust(FALSE);
LOG("E: --Releasing pICruise");
pICruise->Release();
}
break;
//----------------------------------------------------------------------
// Handle UtilityCruiseCar Menu Commands.
//----------------------------------------------------------------------
case IDM_UCRU_CREATE:
LOG("E: === UtilityCruiseCar Menu: Create.");
if (NULL == m_pUtilityCruiseCar)
{
hr = CreateUtilityCruiseCar(
NULL,
IID_IUnknown,
(PPVOID)&m_pUtilityCruiseCar);
if (SUCCEEDED(hr))
{
::CheckMenuItem(
hMenu,
IDM_UCRU_CREATE,
MF_BYCOMMAND | MF_CHECKED);
}
else
LOG("C: ???? UtilityCruiseCar creation failed.");
}
else
LOG("E: ???? UtilityCruiseCar already exists.");
break;
case IDM_UCRU_RELEASE:
LOG("E: === UtilityCruiseCar Menu: Release.");
if (NULL != m_pUtilityCruiseCar)
{
RELEASE_INTERFACE(m_pUtilityCruiseCar);
::CheckMenuItem(
hMenu,
IDM_UCRU_CREATE,
MF_BYCOMMAND | MF_UNCHECKED);
}
else
LOG("E: ???? No UtilityCruiseCar to Release.");
break;
case IDM_UCRU_SHIFT:
LOG("E: === UtilityCruiseCar Menu: ICar::Shift");
if (GetInterface(m_pUtilityCruiseCar, IID_ICar, (PPVOID)&pICar))
{
LOG("E: --Calling pICar->Shift");
pICar->Shift(1);
LOG("E: --Releasing pICar");
pICar->Release();
}
break;
case IDM_UCRU_CLUTCH:
LOG("E: === UtilityCruiseCar Menu: ICar::Clutch");
if (GetInterface(m_pUtilityCruiseCar, IID_ICar, (PPVOID)&pICar))
{
LOG("E: --Calling pICar->Clutch");
pICar->Clutch(80);
LOG("E: --Releasing pICar");
pICar->Release();
}
break;
case IDM_UCRU_SPEED:
LOG("E: === UtilityCruiseCar Menu: ICar::Speed");
if (GetInterface(m_pUtilityCruiseCar, IID_ICar, (PPVOID)&pICar))
{
LOG("E: --Calling pICar->Speed");
pICar->Speed(10);
LOG("E: --Releasing pICar");
pICar->Release();
}
break;
case IDM_UCRU_STEER:
LOG("E: === UtilityCruiseCar Menu: ICar::Steer");
if (GetInterface(m_pUtilityCruiseCar, IID_ICar, (PPVOID)&pICar))
{
LOG("E: --Calling pICar->Steer");
pICar->Steer(10);
LOG("E: --Releasing pICar");
pICar->Release();
}
break;
case IDM_UCRU_ENGAGE:
LOG("E: === UtilityCruiseCar Menu: ICruise::Engage");
if (GetInterface(m_pUtilityCruiseCar, IID_ICruise, (PPVOID)&pICruise))
{
LOG("E: --Calling pICruise->Engage");
pICruise->Engage(FALSE);
LOG("E: --Releasing pICruise");
pICruise->Release();
}
break;
case IDM_UCRU_ADJUST:
LOG("E: === UtilityCruiseCar Menu: ICruise::Adjust");
if (GetInterface(m_pUtilityCruiseCar, IID_ICruise, (PPVOID)&pICruise))
{
LOG("E: --Calling pICruise->Adjust");
pICruise->Adjust(FALSE);
LOG("E: --Releasing pICruise");
pICruise->Release();
}
break;
case IDM_UCRU_OFFROAD:
LOG("E: === UtilityCruiseCar Menu: IUtility::Offroad");
if (GetInterface(m_pUtilityCruiseCar, IID_IUtility, (PPVOID)&pIUtility))
{
LOG("E: --Calling pIUtility->Offroad");
pIUtility->Offroad(3);
LOG("E: --Releasing pIUtility");
pIUtility->Release();
}
break;
case IDM_UCRU_WINCH:
LOG("E: === UtilityCruiseCar Menu: IUtility::Winch");
if (GetInterface(m_pUtilityCruiseCar, IID_IUtility, (PPVOID)&pIUtility))
{
LOG("E: --Calling pIUtility->Winch");
pIUtility->Winch(0);
LOG("E: --Releasing pIUtility");
pIUtility->Release();
}
break;
//----------------------------------------------------------------------
// Handle Log Menu Commands.
//----------------------------------------------------------------------
case IDM_LOG_LOGCLEAR:
// Clear the message log.
m_pMsgLog->Clear();
// Use macro to log messages.
LOGID(IDS_START_MESSAGE_LOG);
break;
case IDM_LOG_LOGGING:
// Toggle the state of the Message Logging.
// Toggle the checkmark indicator on the menu selection as well.
{
HMENU hMenu = ::GetMenu(m_hWnd);
BOOL bLogging = ::GetMenuState(
hMenu,
IDM_LOG_LOGGING,
MF_BYCOMMAND) & MF_CHECKED;
if (bLogging)
{
m_pMsgLog->Logging(FALSE);
::CheckMenuItem(
hMenu,
IDM_LOG_LOGGING,
MF_BYCOMMAND | MF_UNCHECKED);
}
else
{
m_pMsgLog->Logging(TRUE);
::CheckMenuItem(
hMenu,
IDM_LOG_LOGGING,
MF_BYCOMMAND | MF_CHECKED);
}
}
break;
case IDM_LOG_COPYCLIP:
// Copy trace message log to clipboard.
m_pMsgLog->Copy();
break;
//----------------------------------------------------------------------
// Handle Help Menu Commands.
//----------------------------------------------------------------------
case IDM_HELP_CONTENTS:
// We have some stubbed support here for bringing up the online
// Help for this application.
ReadHelp(m_hWnd, m_szHelpFile);
break;
case IDM_HELP_TUTORIAL:
// Call the APPUTIL utility function, ReadTutorial, to Browse the HTML
// tutorial narrative file associated with this tutorial code sample.
ReadTutorial(m_hInst, m_hWnd, TEXT(HTML_FILE_EXT));
break;
case IDM_HELP_TUTDLL:
// Call the APPUTIL utility function, ReadTutorial, to Browse the HTML
// tutorial narrative file associated with the DLL server.
ReadTutorial(m_hInst, m_hWnd, TEXT(DLL_TUTFILE_STR));
break;
case IDM_HELP_READSOURCE:
// Call the APPUTIL utility function ReadSource to allow the
// user to open and read any of the source files of COMUSER.
ReadSource(m_hWnd, &m_ofnFile);
break;
case IDM_HELP_ABOUT:
{
CAboutBox dlgAboutBox;
// Show the standard About Box dialog for this EXE by telling the
// dialog C++ object to show itself by invoking its ShowDialog
// method. Pass it this EXE instance and the parent window handle.
// Use a dialog resource ID for the dialog template stored in
// this EXE module's resources.
dlgAboutBox.ShowDialog(
m_hInst,
MAKEINTRESOURCE(IDM_HELP_ABOUT),
m_hWnd);
}
break;
case IDM_HELP_ABOUTDLL:
// Call the COMOBJ DLL to show the DLL's About Box.
::ComObjAboutBox(m_hWnd);
break;
default:
// Defer all messages NOT handled here to the Default Window Proc.
lResult = ::DefWindowProc(m_hWnd, WM_COMMAND, wParam, lParam);
break;
}
return(lResult);
}
/*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
Method: CMainWindow::WindowProc
Summary: Main window procedure for this window object. See CVirWindow
in the APPUTIL library (APPUTIL.CPP) for details on how this
method gets called by the global WindowProc.
Args: UINT uMsg,
Windows message that is "sent" to this window.
WPARAM wParam,
First message parameter (word sized).
LPARAM lParam)
Second message parameter (long sized).
Modifies: ...
Returns: LRESULT
Standard Windows WindowProc return value.
M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
LRESULT CMainWindow::WindowProc(
UINT uMsg,
WPARAM wParam,
LPARAM lParam)
{
LRESULT lResult = FALSE;
switch (uMsg)
{
case WM_CREATE:
{
// Setup for painting text in this window.
HDC hdc = GetDC(m_hWnd);
::GetTextMetrics(hdc, &m_tm);
::ReleaseDC(m_hWnd, hdc);
}
break;
case WM_MEASUREITEM:
// Get setup for painting text in this window.
{
LPMEASUREITEMSTRUCT lpmis = (LPMEASUREITEMSTRUCT) lParam;
lpmis->itemHeight = m_tm.tmHeight + m_tm.tmExternalLeading;
lpmis->itemWidth = m_wWidth;
lResult = TRUE;
}
case WM_SIZE:
// Handle a resize of this window.
m_wWidth = LOWORD(lParam);
m_wHeight = HIWORD(lParam);
// Resize the Message Log ListBox
m_pMsgLog->Resize(m_wWidth, m_wHeight);
break;
case WM_COMMAND:
// Dispatch and handle any Menu command messages received.
lResult = DoMenu(wParam, lParam);
break;
case WM_CLOSE:
// The user selected Close on the main window's System menu
// or Exit on the File menu.
case WM_QUIT:
// If the app is being quit then close any associated help windows.
default:
// Defer all messages NOT handled here to the Default Window Proc.
lResult = ::DefWindowProc(m_hWnd, uMsg, wParam, lParam);
break;
}
return(lResult);
}
/*F+F++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Function: UnicodeOk
Summary: Checks if the platform will handle unicode versions of
Win32 string API calls.
Args: void
Returns: BOOL
TRUE if unicode support; FALSE if not.
------------------------------------------------------------------------F-F*/
BOOL UnicodeOk(void)
{
BOOL bOk = TRUE;
TCHAR szUserName[MAX_STRING_LENGTH];
DWORD dwSize = MAX_STRING_LENGTH;
if (!GetUserName(szUserName, &dwSize))
bOk = ERROR_CALL_NOT_IMPLEMENTED == GetLastError() ? FALSE : TRUE;
return bOk;
}
/*F+F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F
Function: InitApplication
Summary: Initializes the application and registers its main window
class. InitApplication is called only once (in WinMain).
Args: HINSTANCE hInstance)
Handle to the first instance of the application.
Returns: BOOL.
TRUE if success.
FALSE if fail.
F---F---F---F---F---F---F---F---F---F---F---F---F---F---F---F---F---F---F-F*/
BOOL InitApplication(
HINSTANCE hInstance)
{
BOOL bOk;
// The window class for all instances of the main frame window.
WNDCLASSEX wcf;
// Assign the appropriate values for this main frame window class.
wcf.cbSize = sizeof(WNDCLASSEX);
wcf.cbClsExtra = 0; // No per-class extra data.
wcf.cbWndExtra = 0; // No per-window extra data.
wcf.hInstance = hInstance; // Application module instance.
wcf.lpfnWndProc = &WindowProc; // Global Window Procedure (defined in
// APPUTIL for all CVirWindows).
wcf.hCursor = LoadCursor(NULL, IDC_ARROW); // Load app cursor.
wcf.hIcon = (HICON) LoadIcon( // Load app icon.
hInstance,
TEXT("AppIcon"));
wcf.hIconSm = (HICON) LoadImage( // Load small icon.
hInstance,
TEXT("AppIcon"),
IMAGE_ICON,
16, 16,
0);
wcf.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1); // Default backgnd color.
wcf.style = CS_HREDRAW | CS_VREDRAW; // Class style(s).
wcf.lpszClassName = TEXT(MAIN_WINDOW_CLASS_NAME_STR); // Class name.
wcf.lpszMenuName = TEXT(MAIN_WINDOW_CLASS_MENU_STR); // Menu name.
// Register the window class and return FALSE if unsuccesful.
bOk = RegisterClassEx(&wcf);
return (bOk);
}
/*F+F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F+++F
Function: WinMain
Summary: The Windows main entry point function for this application.
Initializes the application, the COM Libraries, and starts
the main application message loop.
Args: HINSTANCE hInstance,
Instance handle; a new one for each invocation of this app.
HINSTANCE hPrevInstance,
Instance handle of the previous instance. NULL in Win32.
LPSTR lpCmdLine,
Windows passes a pointer to the application's
invocation command line.
int nCmdShow)
Bits telling the show state of the application.
Returns: int
msg.wParam (upon exit of message loop).
FALSE if this instance couldn't initialize and run.
F---F---F---F---F---F---F---F---F---F---F---F---F---F---F---F---F---F---F-F*/
extern "C" int PASCAL WinMain(
HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
CMainWindow* pWin = NULL;
MSG msg;
HACCEL hAccel;
int iRun = FALSE;
// If we were compiled for UNICODE and the platform seems OK with this
// then proceed. Else we error and exit the app.
if (UnicodeOk())
{
// Call to initialize the COM Library. Use the SUCCEEDED macro
// to detect success. If fail then exit app with error message.
if (SUCCEEDED(CoInitialize(NULL)))
{
// If we succeeded in initializing the COM Library we proceed to
// initialize the application. If we can't init the application
// then we signal shut down with an error message exit.
iRun = InitApplication(hInstance);
if (iRun)
{
// Assume we'll set iRun to TRUE when initialization is done.
iRun = FALSE;
// We are still go for running so we try to create a nifty new
// CMainWindow object for this app instance.
pWin = new CMainWindow;
if (NULL != pWin)
{
// Now we initialize an instance of the new CMainWindow.
// This includes creating the main window.
if (pWin->InitInstance(hInstance, nCmdShow))
{
// Load the keyboard accelerators from the resources.
hAccel = LoadAccelerators(hInstance, TEXT("AppAccel"));
if (NULL != hAccel)
{
// Signal App Initialization is successfully done.
iRun = TRUE;
}
}
}
}
if (iRun)
{
// If we initialized the app instance properly then we are still
// go for running. We then start up the main message pump for
// the application.
while (GetMessage(&msg, NULL, 0, 0))
{
if (!TranslateAccelerator(
pWin->GetHwnd(),
hAccel,
&msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
// We'll pass to Windows the reason why we exited the message loop.
iRun = msg.wParam;
}
else
{
// We failed to initialize the application. Put up error message
// box saying that application couldn't be initialized. Parent
// window is desktop (ie, NULL). Exit the failed application
// (ie, by returning FALSE to WinMain).
ErrorBox(hInstance, NULL, IDS_APPINITFAILED);
// Delete the CMainWindow object.
DELETE_POINTER(pWin);
}
// We're exiting this app (either normally or by init failure) so
// shut down the COM Library.
CoUninitialize();
}
else
{
// We failed to Initialize the COM Library. Put up error message box
// saying that COM Library couldn't be initialized. Parent window
// is desktop (ie, NULL). Exit the failed application (ie, by
// returning FALSE to WinMain).
ErrorBox(hInstance, NULL, IDS_COMINITFAILED);
}
}
else
{
// If we were compiled for UNICODE but the platform has problems with
// this then indicate an error and exit the app immediately.
CHAR szMsg[MAX_STRING_LENGTH];
if (LoadStringA(
hInstance,
IDS_UNICODEFAIL,
szMsg,
MAX_STRING_LENGTH))
{
MessageBoxA(
NULL,
szMsg,
ERROR_TITLE_STR,
MB_OK | MB_ICONEXCLAMATION);
}
}
return iRun;
}