INT 2fH 0101H: Submit File to Spooler

                                                         Compatibility: 3.0+ 
 Expects: AX    0101H
          DS:DX addr of an AddFileRec (see below) describing file to enqueue
          ──────────────────────────────────────────────────────────────────
 Returns: AX    error code (if CF=CY)
          ──────────────────────────────────────────────────────────────────
    Info: Enqueues a file for background printing (only if PRINT.EXE is
          resident in memory.

    DS:DX is the address of a data packet formatted as follows:

          AddFileRec
            Offset Size Contents
            ▀▀▀▀▀▀ ▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
             +0      1  bLevel         must be 00H)
             +1      4  pfszFilespec   Far address of an ASCIIZ▲ filespec
                                       of the file to print.  No wildcards.
                     5                 size of an AddFileRec

    Note: A Microsoft Technote warns users of this fn to use only "well-
          formed" (fully-qualified) filespecs of files that already exist.
          PRINT does not perform error checking.

See Also: INT 2fH 01xxH: DOS Print Spooler Functions
          INT 2fH: Multiplex Interrupt
          DOS Functions
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