INT 92 - Da Vinci eMail Dispatcher - "NetClose"
	AX = E10Ah
	BX = size of parameter block in words (0001h)
	CX:DX -> parameter block (see #03988)
Return: AX = 0001h
Desc:	this function is used to close a dispatcher handle
SeeAlso: AX=E105h


Format of Da Vinci eMail "NetClose" parameter block:
Offset	Size	Description	(Table 03988)
 00h	WORD	handle from NetOpen