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
...{
        /**//// <summary>
        /// Form1 的摘要说明。
        /// </summary>
        public class Form1 : System.Windows.Forms.Form
        ...{
                /**//// <summary>
                /// 必需的设计器变量。
                /// </summary>
                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
                        //
                }

                /**//// <summary>
                /// 清理所有正在使用的资源。
                /// </summary>
                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
                /**//// <summary>
                /// 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。
                /// </summary>
                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

                /**//// <summary>
                /// 应用程序的主入口点。
                /// </summary>
                [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)
                ...{
                
                }


        }
}