本文借助C#的繪圖功能講解了制作公章的方法：

private void button1_Click(object sender, System.EventArgs e)
        {
                Graphics g = this.CreateGraphics();
                g.Clear(Color.White);
                //g.InterpolationMode = InterpolationMode.HighQualityBicubic;
                g.CompositingQuality = CompositingQuality.HighQuality;
                g.SmoothingMode = SmoothingMode.HighQuality;

                int radius = 200;
                CircularTextualLayout ctl = new CircularTextualLayout();
                ctl.Radius = radius;
                Point location = new Point(50, 20);
                //ctl.CenterPoint = new Point(location.X + radius, location.Y + radius);
                ctl.TextDrawing = "武林網樂園歡迎您";

                float arcAngle = 270;
                ctl.ArcAngle = arcAngle;
                ctl.AngleStart = -arcAngle/2 + arcAngle/2/ctl.TextDrawing.Length;
                ctl.TextFontInner = new Font("方正姚體", radius/3.2f);
                ctl.RatioX = 0.6f;
                ctl.BorderWidth = (int)(ctl.Radius / 40);
                //ctl.IsBold = false;
                ctl.Location = location;
                ctl.WordsColor = Color.FromArgb(250, Color.Red);
                ctl.BorderColor = Color.FromArgb(250, Color.Red);
                ctl.RectColor = Color.FromArgb(250, Color.Red);
                ctl.Draw(g);

                g.Dispose();
        }