NAME

       EraseRect -- Fill a defined rectangular area using the current
                        BackFill hook. (V36)

   SYNOPSIS
        EraseRect( rp, xmin, ymin, xmax, ymax)
                  a1  d0:16 d1:16 d2:16 d3:16

        void EraseRect(struct rastport *, short, short, short, short);

   FUNCTION
        Fill the rectangular region specified by the parameters with the
        BackFill hook. If non-layered, the rectangular region specified by
        the parameters is cleared. If layered the Layer->BackFill hook is used.

   INPUTS
        rp      - pointer to a rastport structure
        xmin    - x coordinate of the upper left corner of the region to fill.
        ymin    - y coordinate of the upper left corner of the region to fill.
        xmax    - x coordinate of the lower right corner of the region to fill.
        ymax    - y coordinate of the lower right corner of the region to fill.

   BUGS

   NOTES
        The following relation MUST be true:
        (xmax >= xmin) and (ymax >= ymin)

   SEE ALSO
        graphics/rastport.h graphics/clip.h