INT 21,5F AL=04 Cancel Device Redirection (DOS 3.1+)

AH = 5F

AL = 04

DS:SI = far pointer to ASCIIZ local device name

on return

AX = error code if CF set

= 01 function code invalid

ASCIIZ string is not an existing source device

= 0F redirection paused on server

- local device name in DS:SI can be a drive designator

(D:), a printer name (PRN or LPTx), or a string beginning

with 2 backslashes "\\"

- when two backslashes are used for the string the connection

between the local machine and network directory terminates

- fails if file sharing is not loaded