Format of VINES control block for subfunction 000Bh:
Offset	Size	Description	)
 00h	WORD	000Bh
 02h	WORD	pointer to argument block (see #03344)
 04h	WORD	error return code (see #03325)
 06h  2 BYTEs	reserved
 08h	WORD	user CS register
SeeAlso: #03342