Int 21 Fn 5D09  U - DOS 3.1+ Network - Flush Redirected Printer Output     [D]

   AX = 5D09h

Notes: forces redirected printer output to be printed, and starts a new print
     job
   this function is also supported by 10Net, which calls it Terminate All
     Spool Jobs, and does not flush if in "combine" mode

See Also: AX=5D07h,AX=5D08h,INT 2F/AX=1125h