INT 21 - LANtastic v4.0+ - CANCEL SERVER SHUTDOWN
AX = 5FC9h
ES:DI -> ASCIZ server name in form "\\machine"
Return: CF clear if successful
CF set on error
AX = error code
Note:   you must have the "S" privilege to use this call

See also: 215F

215FC9 - LANtastic v4.0+ - CANCEL SERVER SHUTDOWN