GDI+中区域的定义和绘制
 
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Drawing.Drawing2D;

namespace 区域
...{
        /** ////
         /// Form1 的摘要说明。
         ///
         public class Form1 : System.Windows.Forms.Form
        ...{
                /** ////
                 /// 必需的设计器变量。
                 ///
                 private System.ComponentModel.Container components = null;

                 public Form1()
                ...{
                         //
                         // Windows 窗体设计器支持所必需的
                         //
                        InitializeComponent();

                         //
                         // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
                         //
                }

                /** ////
                 /// 清理所有正在使用的资源。
                 ///
                 protected override void Dispose( bool disposing )
                ...{
                         if( disposing )
                        ...{
                                 if (components != null)    
                                ...{
                                        components.Dispose();
                                }
                        }
                         base.Dispose( disposing );
                }

Windows Form Designer generated code #region Windows Form Designer generated code
                /** ////
                 /// 设计器支持所需的方法 - 不要使用代码编辑器修改
                 /// 此方法的内容。
                 ///
                 private void InitializeComponent()
                ...{
                         //    
                         // Form1
                         //    
                         this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
                         this.ClientSize = new System.Drawing.Size(632, 526);
                         this.Name = "Form1";
                         this.Text = "区域";
                         this.Load += new System.EventHandler( this.Form1_Load);

                }
                #endregion

                /** ////
                 /// 应用程序的主入口点。
                 ///
                [STAThread]
                 static void Main()    
                ...{
                        Application.Run( new Form1());
                }

                 protected override void OnPaint(PaintEventArgs e)
                ...{
                        Graphics g= e.Graphics;
                        g.FillRectangle(Brushes.White, this.ClientRectangle);
                        Region r1= new Region( new RectangleF(60, 50, 150, 100));

                        GraphicsPath gp= new GraphicsPath();
                        gp.AddLine(300, 50, 500, 100);
                        gp.AddLine(500, 100, 400, 200);
                        gp.CloseFigure();
                        gp.StartFigure();
                        gp.AddEllipse(50, 200, 200, 100);
                        Region r2= new Region(gp);

                        g.FillRegion(Brushes.CornflowerBlue, r1);
                        g.FillRegion(Brushes.DarkOrange, r2);
                        r1.Dispose();
                        r2.Dispose();
                        gp.Dispose();
                }

                 private void Form1_Load( object sender, System.EventArgs e)
                ...{
                
                }


        }
}