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比方说你有个pictureBox控件,然后在这个控件的MouseMove事件中写
Image myImage = new Bitmap(400, 400); //根据pictureBox 大小
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
Graphics g = Graphics.FromImage(myImage);
g.DrawRectangle(Pens.Black, e.X, e.Y, 1, 1);
pictureBox1.Image = myImage;
}
Image myImage = new Bitmap(400, 400); //根据pictureBox 大小
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
Graphics g = Graphics.FromImage(myImage);
g.DrawRectangle(Pens.Black, e.X, e.Y, 1, 1);
pictureBox1.Image = myImage;
}
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