
        private void Form1_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
                MessageBox.Show(" Left  ");
            else if (e.Button == MouseButtons.Middle)
                MessageBox.Show(" Middle  ");
            else if (e.Button == MouseButtons.Right)
                MessageBox.Show(" Right  ");
            Label1.Text = "(" + e.X.ToString() + "," + e.Y.ToString() + ")";

        }

 
