Int 17 Fn 2400  - Shamrock Software Net.24 V3.11+ - Enable/disable API Fu  [N]

   AX = 2400h
   DL = new state
       00h disabled
       01h enabled

Return: DL = 24h if installed
   DH = minor version number
   CX = network address of this machine
   AL = status
       00h successful
       01h timeout
       02h header error
       03h data error
       04h busy
       05h invalid parameters

See Also: AX=2403h,INT 16/AX=4500h