INT 2fH 1606H: Windows Is About to Terminate

                                                      Compatibility: Win 3.x 
  Expect: AX    1606H
          DX    flags: bit 0=1 if standard mode
                       bit 0=0 if enhanced 368 mode
          ──────────────────────────────────────────────────────────────────
  Return: none
          ──────────────────────────────────────────────────────────────────
    Info: TSRs and DOS-level device drivers may intercept this function as
          a way to be notified when Windows is about to terminate.

          Your handler will later receive an INT 2fH 1609H notification to
          indicate that windows is actually terminating.

See Also: INT 2fH 16xxH: Enh386 Windows Services & Notifications
          INT 2fH: Multiplex Interrupt
          DOS Functions
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