我可以用mouseClick绘制一个矩形吗?到目前为止,我的代码无效.你能帮助我吗?
private void panel1_MouseClick(object sender, MouseEventArgs e)
{
Graphics g = this.CreateGraphics();
Pen pen = new Pen(Color.Black, 2);
g.DrawRectangle(pen, 100,100, 100, 200);
}
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