Int 2F Fn 0203  U - PC LAN Program Redir/redirifs Internal - ???           [N]

   AX = 0203h

Return: nothing???

Notes: this function is called by the DOS 3.3+ PRINT.COM
   AX=0204h appears to be the opposite function
   these functions are supposedly used to signal opening and closing of
     printers

See Also: AX=0200h,AX=0204h