有程序段如下:
private void button1_ Click(object sender, EventArgs e)
{
Graphics g;
g = this.CreateGraphics();
Pen p = new Pen(Color.Green, 3);
g.DrawEllipse(p, 40, 40, 120, 120);
g.DrawRectangle(p, 40, 40, 120, 120);
p.Dispose();
g.Dispose();
}
画出程序运行后,单击窗口中的buttonl按钮,在窗体中所绘制出的图形。