memDC.SelectObject(tool->m_bitmap1);
dc.SetClippingRegion(ax, ay, (bx-ax+1), (by-ay+1));
dc.Blit((ax+2), (ay+2), (bx-ax-2), (by-ay-2), &memDC, 0, 0);
memDC.SelectObject(tool->m_bitmap1);
dc.SetClippingRegion(ax, ay, (bx-ax+1), (by-ay+1));
dc.Blit((ax+2), (ay+2), (bx-ax-2), (by-ay-2), &memDC, 0, 0);