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  Include:  FGRAPH.FI, FGRAPH.FD
 
  Type:     INTEGER*2 FUNCTION
 
  Routine:  polygon( control, points, numpoints )
            INTEGER*2 control, numpoints
            RECORD/xycoord/ points [FAR, REFERENCE]
 
            polygon_w( control, points, numpoints )
            INTEGER*2 control, numpoints
            RECORD/wxycoord/ points [FAR, REFERENCE]
 
  Returns:  a nonzero value if the polygon is drawn successfully,
            or 0 if not.
 
  See also: arc, ellipse, floodfill, lineto, pie, rectangle,
            setcolor, setfillmask, setlinestyle
                                    -♦-