Format of VINES argument block for subfunction 0002h:
Offset	Size	Description	)
 00h	WORD	routine metric
 02h	WORD	error return code
 04h	WORD	socket identifier
 06h	WORD	pointer to send buffer (see #03332)
 08h	WORD	length of send buffer
 0Ah	WORD	message request flags (see #03331)
 0Ch 16 BYTEs	socket address (see #03333)
 1Ch	WORD	timeout value in multiples of 200ms
 1Eh	WORD	connection identifier
 20h	WORD	type of request
		0001h send message
		0002h establish a virtual connection
		0003h terminate a virtual connection
SeeAlso: #03329,#03335