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 ClipBoard Unit for BP7   Matthias Koeppe 15.09.94

Модуль для работы с ClipBoard (Буфером Обмена) в Паскаль-программах. Если программа запускается из-под Windows, то используется ClipBoard системы. При работе в чистом DOS модуль берет на себя эффективную эмуляцию Буфера Обмена. Компилируется в Real/Protected/Win16 режимах.
The ClipBrd unit provides a clipboard for DOS and DPMI programs, which is accessible in Windows' style. When your application is running in a DOS box under Windows, Windows's clipboard functions are used. If it is not, the functions are efficiently emulated.



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Unit ClipBrd ------------ The ClipBrd unit provides a clipboard for DOS and DPMI programs, which is accessible in Windows' style. When your application is running in a DOS box under Windows, Windows's clipboard functions are used. If it is not, the functions are efficiently emulated. So your programs can take part in dynamical data exchange (DDE), though not being dependent on Windows. Unit ClipBrd: Functions and Procedures Unit ClipBrd: Variables Clipboard Format Constants Using Windows' Clipboard Clipboard Emulation Force Clipboard Emulation Copyright Unit ClipBrd: Functions and Procedures -------------------------------------- CloseClipboard EmptyClipboard ForceEmulation GetClipboardData GetClipboardDataSize OpenClipboard SetClipboardData See also: Unit ClipBrd Unit ClipBrd: Variables ----------------------- var WinOldAp: Boolean; READ ONLY The main of the ClipBrd unit stores the result of the test whether running inside a DOS box into this variable. See also: Unit ClipBrd CloseClipboard (Unit ClipBrd) -------------- function CloseClipboard: Boolean; This function closes the clipboard, such that other applications may access it. Returns: true if successful In the emulating mode, CloseClipboard is without function. It always returns TRUE. EmptyClipboard (Unit ClipBrd) -------------- function EmptyClipboard: Boolean; This function empties the clipboard. Before calling EmptyClipboard, the clipboard must be opened by OpenClipboard. Returns: true if successful ForceEmulation (Unit ClipBrd) -------------- procedure ForceEmulation; This procedure forces emulating the clipboard, i.e. it disables the use of Windows' clipboard. GetClipboardData (Unit ClipBrd) ---------------- function GetClipboardData(Format: Word; var Data): Boolean; This function fills the buffer Data with a copy of the contents of the clipboard in the specified format. Before calling GetClipboardData, the clipboard must be opened by OpenClipboard. Returns: true if successful For the Format parameter, use the format constants cf_XXXX. GetClipboardDataSize (Unit ClipBrd) -------------------- function GetClipboardDataSize(Format: Word): LongInt; This function retrieves the size of the clipboard data in the specified format. Returns: Byte size of the data. For the Format parameter, use the format constants cf_XXXX. OpenClipboard (Unit ClipBrd) ------------- function OpenClipboard: Boolean; This function opens the clipboard for the calling program, and locks it for any other application. Returns: true if successful In the emulating mode, CloseClipboard is without function. It always returns TRUE. SetClipboardData (Unit ClipBrd) ---------------- function SetClipboardData(Format: Word; var Data; Size: LongInt): Boolean; This function inserts data in the specified format into the clipboard. Before calling SetClipboardData, the clipboard must be opened by OpenClipboard. If there were alreeady data in this format, they are replaced by the new data. After the call, the memory block Data belongs to the clipboard. The program may not access it any more. Returns: true if successful Parameter Description ----------------------------------------------------------- Format Data format (Constants cf_XXXX). Data Memory block (on heap), representing the data Size Byte size of the memory block. cf_XXXX: Clipboard Format Constants ----------------------------------- Constant Description --------------------------------------------------------------------------- cf_Text ANSI text (used by Windows applications). Each line is ended by CR-LF, the text is ended by NUL. cf_Bitmap Windows bitmap. cf_MetaFilePict Windows metafile. cf_SYLK MS Symbolic Link Format. cf_DIF Software Arts' Data Interchange Format. cf_TIFF Tag Image File Format. cf_OEMText OEM text (used by DOS applications). Each line is ended by CR-LF, der text is ended by NUL. cf_DIB A memory block including a TBitmapInfo structure, followed by bitmap data. cf_Palette Windows palette. See also: Unit ClipBrd Clipboard Emulation ------------------- When your application is running outside Windows, the clipboard functions are emulated. * The main installs an ExitProc, freeing all clipboard data on exit. * OpenClipboard und CloseClipboard are without function because the clipboard is used by only one program. See also: Unit ClipBrd Using Windows' Clipboard ------------------------ When your application is running inside a DOS box of Windows, Windows' clipboard functions are used. Since Windows rounds up the size of the memory blocks, the size returned by GetClipboardDataSize needs not match this specified at a SetClipboardData call. Take care that you will dispose the whole block, and not only the memory area used. That means, e.g. use FreeMem instead of StrDispose. See also: Unit ClipBrd Copyright and Disclaimer of Warranty ---------------------- The files of the software product provided as a whole are called Software. Copyright The Software is neither "Public Domain", nor "Freeware". The Software is protected by the laws of the Federal Republic of Germany and international agreements. Copyright (C) 1993, 1994 Matthias KФppe, Erzbergerstraсe 12, D-39104 Magdeburg. All rights reserved. Disclaimer of Warranty The Software is supplied as is. The authors disclaim all warranties, expressed or implied, including but not limited to the warranties of merchantability and of fitness for any purpose. The authors assume no liability for damages, direct or consequential, which may result from the use of the Software. General Agreement Using the Software, you agree to the general agreement, which is stated in the file SOFTWARE.DOC. If you have a copy of the Software that doesn't include this file, refer to: Matthias Koeppe MKM GbR f. Softwareentwicklung Erzbergerstraсe 12 D-39104 Magdeburg GERMANY Phone/Fax +49-391-5 43 01 28 CIS [100331,174]