int ( __stdcall *pfnFFBmpServices )( int, HANDLE, void* );

• service 1 - check the file is a 256 colours bitmap
• service 2 - get image width in pixels
• service 3 - get image length in lines
• service 4 - get the pointer to the colour palette associated with the image
• service 5 - load the bitmap into the memory

Don't forget to allocate as much memory as requested to accomodate the whole image (the size in bytes of the memory area should be the product of the image width by the image height).

The application program is in charge to open and close the bitmap file, using the standard Win32 APIs CreateFile and CloseHandle.

• first parameter: number of the requested service (from 1 to 5)
• second parameter: handle to the bitmap file
• third parameter - the meaning of the 3rd parameter varies according to the requested service:
  • service 1: NULL
  • service 2: NULL
  • service 3: NULL
  • service 4: NULL
  • service 5: pointer to the allocated memory

• service 1: 1=the file is a good bitmap; 2=the file is not a good bitmap
• service 2: image width in pixels
• service 3: image length in lines
• service 4: pointer to the colour palette
• service 5: 1=the image has been correctly loaded