Q82167: INFO: DeviceCapabilities(DC_BINNAMES) Data Format

Article: Q82167
Product(s): Microsoft Windows Software Development Kit
Version(s): WINDOWS:3.1
Operating System(s): 
Keyword(s): _IK kbSDKWin16
Last Modified: 04-JUL-1999

3.10
WINDOWS
kbprg

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The information in this article applies to:

- Microsoft Windows Software Development Kit (SDK) 3.1 
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SUMMARY
=======

When an application calls the DeviceCapabilities() API with the nIndex parameter
set to DC_BINNAMES, 24 bytes are required for each bin name.

DeviceCapabilities() returns the name of each bin as a null-terminated string in
a character array. Each bin-name entry requires 24 bytes and begins on the
[(n-1) * 24] byte of the array.

The following code demonstrates how to allocate a block of memory, retrieve the
bin names, and walk through the array of bin names. The code assumes that
GetProcAddress() has been used to retrieve a long pointer to the
DeviceCapabilities() in the printer driver and that the pointer was stored in
the lpfnDevCap variable:

     if ((dwDMSize = (*lpfnDevCap)(lpszDevice, lpszPort, DC_BINNAMES,

                                   0L, lpDevMode))
          && (dwDMSize != (DWORD)(-1)))

     {

        if (hMem = GlobalAlloc(GMEM_MOVEABLE, (WORD)dwDMSize * 24))
        {
           lpMem = (LPINT)GlobalLock(hMem);
           nBins = (WORD)(*lpfnDevCap)(lpszDevice, lpszPort,
                                       DC_BINNAMES, lpMem, lpDevMode);
           for (lpBins = lpMem, i = 0; i < nBins; i++, lpBins += 24)
           {
              // lpBins points to the null-terminated bin name.
           }
           GlobalUnlock(hMem);
           GlobalFree(hMem);
        }

     }

Additional query words: 3.10

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Keywords          : _IK kbSDKWin16 
Technology        : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK310
Version           : WINDOWS:3.1
Issue type        : kbinfo

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