pDriverData (PDRIVDATA) - input

NULL or pointer to memory location for DRIVDATA structure:

cb

Number of bytes in the structure.
lVersion
Version number of the presentation driver. Subsequently used by the presentation driver to verify its entry in the INI file.
szDeviceName[32]
Device name.
abGeneralData
Driver-specific data for job or printer properties.
If pDriverData is NULL, the handling routine in the presentation driver must return the length of the driver's DRIVDATA structure for either job or printer properties.