- Create a Graphics object
- Create a Font object
- Call Graphics.DrawString method
private void Form1_Paint(object sender, PaintEventArgs e) { Graphics g = e.Graphics; Font f = new Font("Arial", 12, FontStyle.Bold); g.DrawString("Copyright 2009", f, Brushes.Black, 10, 10); }

Most likely you wouldn't. You would use a label instead. But you can also draw strings on images and that is most likely what you would use this method for.
More Info: MSDN: Graphics.DrawString Method