Int 2A Fn 04  - Network - Execute Netbios Request                          [N]

   AH = 04h
   AL = error retry
       00h automatically retry request on errors 09h, 12h, and 21h
         (see #2919 at INT 5C"NetBIOS")
       01h no retry
       02h ???
   ES:BX -> Network Control Block (see #2920 at INT 5C"NetBIOS")

Return: AX = 0000h if successful
   AH = 01h on error
       AL = error code

Notes: invokes either INT 5B or INT 5C as appropriate
   supported by PC LAN Program, LANtastic, LAN Manager, NetWare, 10NET,
     etc.
   NetWare 2.15 NetBIOS emulator returns CF clear if successful, CF set
     on error
   PC LAN Program defines any non-zero return value in AH as an error
     indicator for subfunction 00h, and any non-zero return value in AX
     as an error indicator for subfunction 01h

See Also: AH=00h,AH=01h,AX=0500h,INT 5B"Extended NetBIOS",INT 5C"NetBIOS"