Windows 3.1 Device Drivers (ddag31qh.hlp) (Table of Contents; Topic list)
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The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
New/Updated Functions for 3.1
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◄AdvancedSetUpDialog►         Prompts for advanced print-job options (NEW)
 
◄BitBlt►                      Transfers bits from a source to destination
                              (UPDATE)
 
◄BitmapBits►                  Sets or retrieves bits in a memory DC (NEW)
 
◄cextfcn►                     Carry out extended function (UPDATE)
 
◄CommWriteString►             Transmits a string of bytes (NEW)
 
◄CONFIG.BIN►                  Configuration resource for displays (UPDATE)
 
◄CplApplet►                   Carries out requests from Control Panel (NEW)
 
◄DeviceBitmapBits►            Get or set device-independent bitmap bits
                              (UPDATE)
 
◄DeviceCapabilities►          Retrieves the capabilities of a device
                              (UPDATE)
 
◄DeviceMode►                  Sets the device's mode of operation (UPDATE)
 
◄DevInstall►                  Install or removes a printer (NEW)
 
◄EnableNotification►          Enable/disables communication notification
                              (NEW)
 
◄EngineDeleteFont►            Deletes a TrueType font (NEW)
 
◄EngineEnumerateFont►         Enumerates TrueType fonts (NEW)
 
◄EngineGetCharWidth►          Retrieves character widths (NEW)
 
◄EngineGetGlyphBmp►           Retrieves a glyph from a font (NEW)
 
◄EngineRealizeFont►           Creates an engine font (NEW)
 
◄EngineSetFontContext► (NEW)  Sets the current engine font (NEW)
 
◄EnumDFonts►                  Enumerates device fonts (UPDATE)
 
◄ExtDeviceMode►               Sets the device's mode of operation (UPDATE)
 
◄ExtTextOut►                  Draws text strings (UPDATE)
 
◄GetDriverResourceID►         Retrieves resource identifiers (NEW)
 
◄GetLPDevice►                 Retrieves pointer to the physical device
                              structure (NEW)
 
◄GetRasterizerCaps►           Retrieves information about TrueType (NEW)
 
◄InkReady►                    Requests display driver to permit inking
                              (NEW)
 
◄LFNCopy►                     Copies a file (NEW)
 
◄LFNDelete►                   Deletes a file (NEW)
 
◄LFNFindFirst►                Searches for the first file with a matching
                              name (NEW)
 
◄LFNFindNext►                 Searches for the next file with a matching
                              name (NEW)
 
◄LFNFindClose►                Ends the search for matching files (NEW)
 
◄LFNGetAttributes►            Retrieves file attributes (NEW)
 
◄LFNGetVolumeLabel►           Retrieves the volume label (NEW)
 
◄LFNMKDir►                    Creates a directory (NEW)
 
◄LFNMove►                     Moves a file (NEW)
 
◄LFNParse►                    Parses paths (NEW)
 
◄LFNRMDir►                    Removes a directory (NEW)
 
◄LFNSetAttributes►            Sets file attributes (NEW)
 
◄LFNSetVolumeLabel►           Sets the volume label (NEW)
 
◄LFNVolumeType►               Specifies volume type (NEW)
 
◄MOUSETRAILS►                 Enables/disables mouse trails (NEW)
 
◄RealizeObject►               Realizes an object (UPDATE)
 
◄RESETDEVICE►                 Resets the device context (NEW)
 
◄SelectBitmap►                Selects a device bitmap (NEW)
 
◄SetDIBitsToDevice►           Copies Device-Independent Bitmap to Device
                              (UPDATE)
 
◄SETPRINTERDC►                Sets the device context for a printer (NEW)
 
◄StrBlt►                      Draws text strings (UPDATE)
 
◄StretchBlt►                  Stretches/compresses bits (UPDATE)
 
◄StretchDIBits►               Copies a device-independent bitmap (UPDATE)
 
◄[display]►                   Display information section (UPDATE)
 
◄__WinFlags►                  Specifies the CPU type and mode (NEW)
 
◄WNetGetCaps►                 Retrieves network capabilities (NEW)
 
◄WNetConnectDialog►           Displays a shell connection dialog box (NEW)
 
◄WNetConnectionDialog►        Displays a connection dialog box (NEW)
 
◄WNetDisconnectDialog►        Displays a shell disconnection dialog box
                              (NEW)
 
◄WNetDirectoryNotify►         Notifies driver of operations on directories
                              (NEW)
 
◄WNetGetDirectoryType►        Retrieves directory type (NEW)
 
◄WNetGetPropertyText►         Adds buttons to a property dialog box (NEW)
 
◄WNetPropertyDialog►          Supports added buttons in the property dialog
                              (NEW)
 
◄WNetRestoreConnection►       Restores a connection to a network device
                              (NEW)
 
◄WNetViewQueueDialog►         Display a queue viewing dialog box (NEW)
 
◄WNetWriteJob►                Writes to an open print job (NEW)
 
 
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