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- VBMAX LIQUID CRYSTAL DISPLAY DLL
-
- Copyright ⌐ 1995 - 1996 Mike Stanley. All Rights Reserved.
- VBMax - Visual Basic to the Max
-
-
- TABLE OF CONTENTS
-
- - Description
- - Registration
- - Important-Use at Your Own Risk!
- - Installation
- - Frequently Asked Questions
- - Technical Support
- - Gronked Files
- - Packing List
- - How to use the DLL
- - Methods Summary
- - Properties Summary
- - Notes on Color Selection
-
-
-
- DESCRIPTION
-
- A fully functional in-process OLE server for adding LCD style controls to your
- VB 4.0 applications.
-
- VBMaxLCD.dll contains methods and properties for setting the digit and background
- colors, autosizing the display, blinking colons, flashing digits, showing or
- hiding unlit segments and aligning digits left, right or centered.
-
- Written entirely in VB 4.0, VBMaxLCD.dll provides all the functionality of a
- third-party control but without the overhead.
-
- Not only that but you get the source code too, so you can see how it works and
- can tweak it any way you want to suit your own needs.
-
-
-
- REGISTRATION
-
- This is a shareware utility which you can register for US $5 per copy.
- Please send payment to:
-
- Mike Stanley
- 25 Lansdowne Street
- Manchester
- NH 03103
- USA
-
- In return, I will give you a registration ID and an encryption key which will
- allow you to unlock the source code from the file 'VBMaxLCD Source Code.grk'.
-
- *** Don't forget to include your Internet e-mail address. ***
-
- Better still, also send me an e-mail to let me know that your registration is
- on the way.
-
- Any future updates to the software will use the same encryption key, so you can
- always get them at no additional cost.
-
- If you don't have an e-mail address, you can receive the registration ID and
- encryption key via snail-mail by sending me a postage-paid self-addressed envelope.
-
-
-
- IMPORTANT-USE AT YOUR OWN RISK!
-
- While every effort has been made to ensure a reliable, high-quality product, you
- should note that this software is provided 'as is' without any kind of warranty
- whatsoever, neither explicit nor implied.
-
- In order to use this software, you must agree 100% that I will not be held liable
- in any way, shape or form (not even a little bit) for anything untoward that befalls
- anyone or anything, either directly or indirectly, as a result of using this software
- no matter how calamitous, disastrous or inauspicious the occasion may be.
-
- Your use of this software constitutes acceptance of these terms.
-
-
-
- INSTALLATION
-
- Copy the files to a folder of your choice and edit Reg.bat so that it contains the
- correct path for the regsvr32.exe program that comes with VB 4.0. Please note that
- regsvr32.exe is not copied to your hard-drive automatically when you install VB -
- you can find it in the Tools\Pss folder on your VB CD.
-
- Run the edited Reg.bat which will update the Windows registry so that it knows about
- VBMaxLCD.dll.
-
- Go into VB, load Demo.vbp and run it.
-
- If you want to use the DLL in your own programs, you have to add a reference to it
- as follows:
-
- From VB, select Tools from the menu.
-
- Then select References
-
- Locate VBMax Liquid Crystal Display in the list and click the check box so that an
- X appears in it. Click OK.
-
- The OLE server is now visible in the Object Browser.
-
-
-
- FREQUENTLY ASKED QUESTIONS
-
- Q. I try to run your demo program but it keeps telling me that OLE Automation can't
- create the object. Why?
- A. You have not registered VBMaxLCD.dll with Windows. Please refer to the installation
- instructions
- above.
-
- Q. I have searched my hard-drive but cannot find regsvr32.exe. What's the scoop?
- A. Regsvr32.exe is not copied to your hard-drive automatically when you install
- VB - you can find it in the Tools\Pss folder on your VB CD.
-
- Q. Wouldn't it be easier if you just created a regular installation program?
- A. One thing I don't like about VB 4 is the amount of extra baggage that must be
- included with the installation of even the simplest programs-this translates to long
- download times from online services.
-
- Seeing as VBMaxLCD.dll is meant for programmers who already have all the necessary
- software installed on their computers, I decided that manually installing the DLL was
- a fair tradeoff to racking up your online connect time.
-
-
-
- TECHNICAL SUPPORT
-
- Technical support is available via e-mail. Please send questions, comments,
- criticisms, etc. to 74632.2227@compuserve.com.
-
-
-
- GRONKED FILES
-
- These are encrypted files, created using the VBMax Gronk Meister, that contain
- one or more other files. In this case, the file 'VBMaxLCD Source Code.grk' contains
- the complete, commented VB 4.0 source code for VBMaxLCD.dll.
-
- The source files may be extracted using the included VBMax Degronker utility. Before
- you can do that, however, you need to know the encryption key. This key will be given
- to you when you register VBMaxLCD.dll.
-
-
-
- PACKING LIST
-
- Read Me.rtf The document you are reading.
- Demo.vbp (and related files) Source code for demo program showing the DLL in action.
- Reg.bat Registers the DLL with Windows (you have to edit the path).
- Unreg.bat Unregisters the DLL with Windows (you have to edit the path).
- VBMaxLCD Source Code.grk Complete, commented source code for the DLL in gronked format.
- Degronker.exe Utility to extract the source code from the gronked file.
-
-
-
- HOW TO USE THE DLL
-
- When you include a reference to VBMaxLCD.dll in VB as described earlier, you will
- have access to a class called clsLCD. When you select this class using the Object
- Browser, you will see the methods and properties available to you. You can see a
- brief description of what each one does by clicking on them.
-
- In your application, you can create one or more objects from this class module.
- You need a separate object for each LCD control you want to create.
-
- Objects are created from this class by using code like this:
-
- Dim moLCD As New clsLCD
-
- In the following methods and properties summaries, 'Object' evaluates to an object
- created from clsLCD. In this example it would be moLCD.
-
- You create an LCD control by drawing a PictureBox control on a form and then passing
- it to the Container method in the object created by clsLCD.
-
- The DLL provides a high level of control over the appearance of the LCD and also gives
- you the means to blink colons, flash digits and hide or show the unlit segments of the
- digits. The demo program includes many examples.
-
-
-
- METHODS SUMMARY
-
-
- Object.About
- Displays an About box.
-
- Example: moLCD.About
-
-
- Object.Cls
- Clears the contents of the LCD.
-
- Example: moLCD.Cls
-
-
- Object.Redisplay
- Redisplays the current caption. If you need to change the size of the PictureBox container,
- use this method afterwards to redisplay the LCD at the correct size.
-
- Example: moLCD.Redisplay
-
-
- Object.SelectBackColor
- Opens up a common dialog color selection window and allows you to select a color for the
- background.
-
- Example: moLCD.SelectBackColor
-
- See also the BackColor property and the notes on color selection.
-
-
- Object.SelectForeColor
- Opens up a common dialog color selection window and allows you to select a color for the digits.
-
- Example: moLCD.SelectForeColor
-
- See also the ForeColor property and the notes on color selection.
-
-
- Properties Summary
-
- Object.Alignment = Setting
- Sets or returns a value that determines how the digits are aligned in the PictureBox container.
-
- Setting One of the following:
-
- 1) gnALIGN_LEFT
- Left-justifies the digits in the PictureBox.
-
- 2) gnALIGN_RIGHT (default)
- Right-justifies the digits in the PictureBox.
-
- 3) gnCENTER
- Centers the digits in the PictureBox.
-
- Example: moLCD.Alignment = gnALIGN_RIGHT
-
-
- Object.Autosize = Setting
- Sets the Autosize behavior.
-
- Setting One of the following:
-
- 1) gnAUTOSIZE_CONTAINER_TO_LCD (default)
- Adjusts the size of the PictureBox container to match the size of the digits.
-
- 2) gnAUTOSIZE_LCD_TO_CONTAINER
- Adjusts the size of the digits to match the size of the container.
-
- 3) gnAUTOSIZE_OFF
- Makes no adjustment to either the container or the digits.
-
- Example: moLCD.AutoSize = gnAUTOSIZE_CONTAINER_TO_LCD
-
-
- Object.BackColor [ = Color]
- Sets or returns the background color of the LCD.
-
- Color: A value or constant that determines the background color of an LCD.
- The default color is black.
-
- Example 1: moLCD.BackColor = vbBlue
- Example 2: moLCD.BackColor = &H8000&
- Example 3: lColor = moLCD.BackColor
-
- See also the SelectBackColor method and the notes on color selection.
-
-
- Object.BlinkColon [ = Boolean]
- Sets or returns a value that determines whether colons contained in the display should blink.
-
- Boolean: An expression that evaluates to True or False.
- The default is False.
-
- Example 1: moLCD.BlinkColon = True
- Example 2: bBlink = moLCD.BlinkColon
-
- This property is provided so that clock type controls can have blinking colons to mark the
- seconds. If this property is True, the LCD object will alternately show and hide any colons
- in the display. It is the responsibility of the application to set a timer to update the
- caption property at the appropriate intervals. An interval of 500 milliseconds will cause
- the colon to blink about once a second (half a second visible and half a second invisible).
-
-
- Object.Caption [ = String]
- Sets or returns a value that determines the contents of the LCD.
-
- String A string expression that evaluates to the digits displayed as the caption.
-
- Example 1: moLCD.Caption = "123,456.78"
- Example 2: moLCD.Caption = Format$(Now, "mm-dd-yy")
- Example 3: moLCD.Caption = moLCD.Caption + 1 (Evil Type Coercion)
-
-
- Set Object.Container = PictureBox
- Mandatory property that specifies the PictureBox used for the LCD.
-
- PictureBox Regular VB PictureBox control.
-
- Example: Set moLCD.Container = picLCD
-
-
- Object.FlashDigits [ = Boolean]
- Sets or returns a value that determines whether the entire display should flash on and off.
-
- Boolean: An expression that evaluates to True or False.
- The default is False.
-
- Example 1: moLCD.FlashDigits = True
- Example 2: bFlash = moLCD.FlashDigits
-
- This property is provided so that controls can flash to draw attention to themselves when
- an event occurs. Examples could be an alarm clock that flashes when the designated time
- is reached or a nuclear power plant control that flashes when a core meltdown is imminent.
-
-
- Object.ForeColor [ = Color]
- Sets or returns the color of the digits in the LCD.
-
- Color: A value or constant that determines the digits color of an LCD.
- The default color id red.
-
- Example 1: moLCD.ForeColor = vbBlue
- Example 2: moLCD.ForeColor = &H8000&
- Example 3: lColor = moLCD.ForeColor
-
- See also the SelectForeColor method and the notes on color selection.
-
-
- Object.ShowUnlitSegments [ = Boolean]
- Returns or sets a value that determines whether the unlit segments of the digits are displayed.
-
- Boolean: An expression that evaluates to True or False.
- The default is False.
-
- Example 1: moLCD.ShowUnlitSegments = True
- Example 2: bShowUnlit = moLCD.ShowUnlitSegments
- Example 3: moLCD.ShowUnlitSegments = Not moLCD.ShowUnlitSegments
-
- Showing the unlit segments works better with some color combinations than others. For
- instance, red digits against a black background look pretty good but change the digits
- color to white and the effect is not so good. You will have to experiment to see which
- combinations work for you. Also, you really need 256 colors or higher for a decent effect.
-
-
-
- NOTES ON COLOR SELECTION
-
- There are no built-in restrictions about what colors you can use for the digits or the
- background. Realistically, however, you have to exercise a little caution because of
- potential differences between the color palette settings of your system and those of
- the computers on which your application may run.
-
- If your system is running in 16 bit or higher color mode, the colors you choose may look
- a lot different on systems running in 256 colors. You could end up with dithered colors
- which really don't look that great with LCDs. A safe approach may be to select solid
- colors only while you have your system running in 256 colors.
-
-
-
- Mike Stanley
- New Hampshire
- USA
- E-Mail: 74632.2227@compuserve.com
-
-