private void pictureBox2_Paint(object sender, PaintEventArgs e)

{

            PictureBox p = (PictureBox)sender;

            Pen pp = new Pen(Color.Red);

            e.Graphics.DrawRectangle(pp, e.ClipRectangle.X, e.ClipRectangle.Y,
 e.ClipRectangle.X + e.ClipRectangle.Width - , 
e.ClipRectangle.Y + e.ClipRectangle.Height - );   

}