Description
void 
swf_shapecurveto3 ( float x1, float y1, float x2, float y2, float x3, float y3)
     Draw a cubic bezier curve using the x,y coordinate pairs
     x1, y1 and
     x2,y2 as off curve
     control points and the x,y coordinate
     x3, y3 as an
     endpoint.  The current position is then set to the x,y coordinate
     pair given by
     x3,y3.