Format of FaxBIOS GRAPH_GET_FILE_TYPE command buffer:
Offset	Size	Description	)
 00h 12 BYTEs	common data (see #02935)
 0Ch 80 BYTEs	filename
 5Ch	WORD	file type
		0000h unidentified
		0001h native file format
		0002h ASCII
		0003h FaxBIOS Tiff Class F
 5Eh	WORD	bitmap of supported capabilities
 60h  6 BYTEs	future expansion
 66h	WORD	structure size
SeeAlso: #02949,#02950