有程序段如下:
private void button1_Click(object sender, EventArgs e)
{
Graphics gobj = this.CreateGraphics();
Pen p = new Pen(Color.Blue, 5);
Rectangle r = new Rectangle(50, 50, 200, 200);
gobj.DrawEllipse(p, r);
p = new Pen(Color.Red, 3);
Brush b = p.Brush;
gobj.FillEllipse(b, r);
p.Dispose();
b.Dispose();
gobj.Dispose();
}
程序运行后,单击窗口中的button1按钮,将在窗体中绘制出一个 ,它的边框为 色。