Int 21 Fn 5F9C  - LANtastic V3+ - Pop Up Last Received Message             [N]

   AX = 5F9Ch
   CX = time to leave on screen in clock ticks
   DH = 0-based screen line on which to place message

Return: CF clear if successful
   CF set on error
       AX = error code (0Bh)

Notes: the original screen contents are restored when the message is removed
   the message will not appear, and an error will be returned, if the
     screen is in a graphics mode

See Also: AX=5F9Ah