Format of VINES Socket request block:
Offset	Size	Description	)
 00h	WORD	subfunction number (01h-16h)
 02h	WORD	magic number (FEFEh)
 04h	WORD	buffer for return code (set to 0 before calling)
 06h	WORD	reserved (will be set to client DS)
 08h	WORD	reserved (obviously not used; set to 0 before calling)
 0Ah	DWORD	far pointer to parameter block
 0Eh	WORD	StreetTalk handle
SeeAlso: #03324 at INT 61/AX=0001h