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HSCRNSCRL()

    Just when you thought it was safe to clear your screen, here is yet
    another screen trick.  HSCRNSCRL() displays your screen in
    horizontal scrolling fashion, forcing whatever was already on the
    screen off from left to right.

    To use HSCRNSCRL(), first paint your screen then call SAVE_DRAPE()
    as previously described to save your screen to a screen file.

    When you want to restore the screen with the horizontal scroll
    effect, call HSCRNSCRL() as follows:

    HSCRNSCRL(<screen file>)

    Required Parameter

    <screen file> is the name of the file containing the saved screen.

    Sample Usage

    Please refer to the pseudo-code that accompanies the discussion on
    PULL_DRAPE() and SAVE_DRAPE() for tips on how to intelligently
    incorporate HSCRNSCRL() in your program.

    Clipper 5.0 Notes

    The Clipper 5.0 version of this function accepts an optional
    directional parameter (thanks to Evan Davies).

    HSCRNSCRL(<screen file> [, <nDirection> ])

    Optional parameter <nDirection> determines whether display is left
    to right or vice versa.  1 = right to left, -1 = left to right.
    (Default is left-to-right.)