LstOutPtr                Pointer to LST: Output Driver

 LstOutPtr                                                               [TP]

    Turbo Pascal supports the predefined device LST:, both as a filename
    and as a predefined file variable. Output to this device is handled
    through the procedure LstOut(Ch : Char), which simply makes MS-DOS
    system call 5. You can declare your own procedure LstOut, then assign
    its address to LstOutPtr; this makes your function the new output
    driver for the LST: device.

  -------------------------------- Example ---------------------------------

           LstOutPtr := Ptr(MyLstOut);