画笔功能
画笔功能//PictureBox pb = (PictureBox)Control.FromHandle(xx);
Graphics g = pictureBox1.CreateGraphics();
Pen pp = new Pen(Color.Green, 2);
g.DrawLine(pp, new Point(0, 0), new Point(100, 100));
// 一定释放!否则容易内存泄露
g.Dispose();方法二: Graphics g = pictureBox1.CreateGraphics();
g.DrawLine(Pens.Red, new Point(0, 0), new Point(100, 100));
// 一定释放!否则容易内存泄露
g.Dispose();
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