1 protected override void OnPaint(PaintEventArgs e)
 2 {
 3     Graphics g = e.Graphics;
 4 }
 5 private void Pbo_Paint(object sender,PaintEventArgs e)
 6 {
 7     Graphics g = e.Graphics;
 8 }
 9 private void Frm_Paint(object sender,PaintEventArgs e)
10 {
11     Graphics g = e.Graphics;
12 }

其中Pbo_Paint和Frm_Paint都是利用Paint事件进行处理的。很像。