dc.DrawLine(ptArrow[Point_First], ptArrow[Point_Second]);
dc.DrawLine(ptArrow[Point_First].x + 2, ptArrow[Point_First].y,
ptArrow[Point_Third].x - 1, ptArrow[Point_Third].y);
dc.DrawLine(ptArrow[Point_First], ptArrow[Point_Second]);
dc.DrawLine(ptArrow[Point_First].x + 2, ptArrow[Point_First].y,
ptArrow[Point_Third].x - 1, ptArrow[Point_Third].y);