INT 61 - Banyan VINES - "Soint" - SET USER COMPLETION FUNCTION
	AX = 0001h subfn 000Bh
	DS:DX -> communications control block (function 000Bh) (see #03343)
Return: AX = status (00h-0Ah,A2h) (see #03339)
Range:	INT 60h to INT 66h
Note:	The Banyan interrupt handler is identified by the string "BANV" in
	  the four bytes immediately preceding the interrupt handler
SeeAlso: AX=0001h/SF=0005h,AX=0001h/SF=0008h


Format of VINES control block for subfunction 000Bh:
Offset	Size	Description	(Table 03343)
 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


Format of VINES argument block for subfunction 000Bh:
Offset	Size	Description	(Table 03344)
 00h	WORD	pointer to user interrupt function (see #03345)
 02h	WORD	pointer to user stack
 04h	WORD	initial timeout value in multiples of 200ms, FFFFh = infinite
SeeAlso: #03344


(Table 03345)
Values FAR user function is invoked with:
	SS = DS = ES = segment of control block
	STACK:	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	return address
		WORD	argument pointer (sosend or sorec argument block)
		WORD	error return code
			0000h argument pointer is valid
			00A3h timeout