Int 21 Fn 5FA1  - LANtastic - Set Queue Entry                              [N]

   AX = 5FA1h
   BX = handle of opened queue entry
   DS:SI -> queue entry (see AX=5FA0h)

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

Notes: the only queue entry fields which may be changed are output control,
     number of copies, destination device, and comment
   the handle in BX is that from a create or open (INT 21/AH=3Ch,3Dh)
     call on the file "\\server\\@MAIL" or "\\server\@name" (for
     printer queue entries)

See Also: AX=5FA0h,AX=5FA2h,AX=5FA9h