– – Send an OPEN DSM command to the source manager (should be fine) – – Load the source manager (it already did this so should be ok) If you see the “… check cables” message then you passed the initial step and you do have the necessary DLL. So long as you have a TWAIN_32.DLL in your Windows directory, you should pass this step. – – This should be trivial after the above – – LoadLibrary() to load the DLL into memory – – look in GetWindowsDirectory() for “TWAIN_32.DLL” If you see the “TWAIN is unavailable” message it means that the program failed to: The action that kicks everything off in ScanBmp is a C function “CmdDPI()” which calls “CmdUnits()” and specifies “inches” (for the dots per inch that is about to happen).ĬmdUnits() calls “InitTwain()” to set up the scanner connection. That controls the document scanner and gets images as raw bitmaps. This triggers a lot of startup activity to get ready to be able to do that.
One of the first things that CmdTwain does is initialize the scanner for the selected resolution (200 DPI by default). This might help if you are seeing “TWAIN unavailable” or “… check cables” messages.
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