private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
        {
            SolidBrush blueBrush = new SolidBrush(Color.Blue);
            SolidBrush redBrush = new SolidBrush(Color.Red);
            SolidBrush greenBrush = new SolidBrush(Color.Green);
            Rectangle rect = new Rectangle(20, 20, 200, 100);
            String drawString = "Hello GDI+ World!";
            Font drawFont = new Font("Verdana", 14);
            float x = 100.0F;
            float y = 100.0F;
            StringFormat drawFormat = new StringFormat();
            drawFormat.FormatFlags = StringFormatFlags.DirectionVertical;
            e.Graphics.DrawString("Drawing text", new Font("Tahoma", 14), greenBrush, rect);
            e.Graphics.DrawString(drawString, new Font("Arial", 12), redBrush, 120, 140);
            e.Graphics.DrawString(drawString, drawFont, blueBrush, x, y, drawFormat);
            blueBrush.Dispose();
            redBrush.Dispose();
            greenBrush.Dispose();
            drawFont.Dispose();
        }