Int 21 Fn 5F42  u - LAN Manager Enhanced DOS - Local Netservicecontrol     [N]

   AX = 5F42h
   DH = opcode
       00h interrogate status
       01h pause
       02h continue
       03h uninstall
   DL = argument
       01h disk resource
       02h print resource
       04h communications resource (not implemented for DOS)
   ES:BX -> NetServiceControl parameter structure (see below)

Return: CF clear if successful
   CF set on error
       AX = error code

Format of NetServiceControl parameter structure:
Offset Size    Description
 00h   DWORD   -> service name
 04h   WORD    result buffer size
 06h   DWORD   -> result buffer as service_info_2 structure