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SetPropInfo()

    USAGE

        void SetPropInfo(Window, GadgetID, HPos, Vpos)

    FUNCTION

        This updates the horizontal and vertical sliders to the values you provide
        (HPos and VPos), and redraws the gadget.
        This is useful when you have a group of sliders to update and all you need to
        change is their slider positions (as opposed to all the parameters, which
        ModifyProp lets you do).

    INPUTS

        Window   = Pointer to the window the PropInfo structure resides in
        GadgetID = Short integer ID of the Gadget.
        HPos     = Short integer position for horizontal slider between 0 and 65535.
        VPos     = Short integer position for vertical slider between 0 and 65535.

    RESULT

        none (void)