Context menu in winforms

Use Following code on Picture box to display Context menu. It will display default context menu on Right clicking the PictureBox:

private void pictureBox1_MouseClick(object sender, MouseEventArgs e)
        {
            Point p = new Point(900, 5);

            if (e.Button == MouseButtons.Right)
            {
                ContextMenuStrip cms = new ContextMenuStrip();
                pictureBox1.PointToClient(p);   
                cms.Show(comboBox1, p.X, p.Y);
            }
}