Format of VDI control array:
Offset	Size	Description	)
 00h	WORD	(call) function number (0001h-0084h)
 02h	WORD	(call) number of words of pair parameters
 04h	WORD	(ret) number of words of pair results
 06h	WORD	(call) number of words of integer parameters
 08h	WORD	(ret) number of words of integer results
 0Ah	WORD	subfunction number
 0Ch	WORD	graphics handle
 0Eh	DWORD	(call) -> pointer parameter
 12h	DWORD	(ret) -> pointer result
SeeAlso: #04066