public partial class Form1 : Form { public Form1( ) { InitializeComponent( ); PictureBox pb = new PictureBox( ); pb.Parent = this; pb.Dock = DockStyle.Fill; pb.Image = this.Icon.ToBitmap( ); pb.SizeMode = PictureBoxSizeMode.StretchImage; pb.Paint += new PaintEventHandler( PictureBox_Paint ); } private void PictureBox_Paint( object sender, PaintEventArgs e ) { e.Graphics.DrawRectangle( new Pen( Color.Blue, 10.0f ), 10, 10, 100, 100 ); } }