point.x = screen[getPos(r,c)].x; point.y = screen[getPos(r,c)].y;
point.x = screen[getPos(r,c)].x + bi.offLeft; point.y = screen[getPos(r,c)].y + bi.offTop;
   public void getPointFromRowCol (int r, int c, Point point) {      point.x = screen[getPos(r,c)].x;      point.y = screen[getPos(r,c)].y;   }