typedef struct _FASTCONFIG 
   L_UINT   uStructSize; 
   L_UINT   uTransferMode; 
   L_INT    nFileFormat; 
   L_UINT32 ulBufferSize; 
   L_UINT   uTime; 
   L_INT    nBitsPerPixel; 
   L_BOOL   bSuccess; 

The FASTCONFIG structure provides information about a scan configuration to be tested or a scan configuration that is the result of testing.

Member Description
uStructSize Size of this structure in bytes, for versioning. Use the sizeof() macro to calculate this value.
uTransferMode Transfer mode for the scan configuration(s). The possible values are:
  Value Meaning
  LTWAIN_FILE_MODE [0x001] Use File transfer mode
  LTWAIN_BUFFER_MODE [0x002] Use Memory transfer mode
  LTWAIN_NATIVE_MODE [0x004] Use Native transfer mode
nFileFormat Determines the file format that will be used to save scanned images using this scan configuration.
ulBufferSize Determines the buffer size that will be used with the buffer transfer mode. If this value is 0, then use the twain driver preferred buffer size.
uTime The amount of time required to scan the pages used for testing the scan configuration. The number of pages depends on how many pages the user loads in the scanner when testing a scan configuration. The same pages should be used for each test.
nBitsPerPixel Bits per pixel that will be used.
bSuccess Specifies whether the configuration being tested succeeded. Possible values are:
  Value Meaning
  TRUE The current scan configuration was successful.
  FALSE The current scan configuration was not successful.


pFASTCONFIG is a pointer to a FASTCONFIG structure. Where the function parameter type is pFASTCONFIG, you can declare an FASTCONFIG variable, update the structure's fields, and pass the variable's address in the parameter. Declaring a pFASTCONFIG variable is necessary only if your program requires a pointer.

FASTCONFIG is used with the L_TwainFindFastConfig, L_TwainGetScanConfigs and L_TwainFreeScanConfig functions.

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