VC++适时改变窗口的形状，如示例图所示，本程序实现窗体的形状在矩形、椭圆形、多边形窗口、圆矩形窗口等。 -VC++ timely changes in the shape of the window, such as the example shown, the shape of the program realization of the form in the rectangle, ellipse, polygon window, round rectangular windows.