貝爾賽爾樣條曲線

貝爾賽爾樣條曲線是使用GDI（Graphics DeviceInterface，圖像設備藉口）在窗體中繪製的一種曲線圖形。函式結構如下：Public void DrawBezier（Pen pen,Point p1,Point p2,Point p3,Point p4）：Point表示點的坐標。
public void DrawBezier（Pen pen,PointF p1,PointF p2,PointF p3,PointF p4）。
public void DrawBezier（Pen pen,float x1,float y1,float x2,float y2,float x3,float y3,float x4,float y4）。
實例如下：
private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
Graphics g = this.CreateGraphics();
Pen Mypen = new Pen(Color.Blue,2);
Point p1 = new Point(50,50);
Point p2 = new Point(70, 25);
Point p3 = new Point(100, 30);
Point p4 = new Point(120, 85);
g.DrawBezier(Mypen,p1,p2,p3,p4);
g.DrawBezier(Mypen,20,10,60,40,80,45,90,10);
}