>>85
private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
  Image image = new Bitmap(100, 100);

  Graphics g = Graphics.FromImage(image);
  g.DrawString("text", this.Font, Brushes.Black, 0, 0);
  g.Dispose();

  e.Graphics.DrawImage(image, 0, 0, image.Width, image.Height);
}

こんな感じかな?
もっといい方法あるかは知らない…