C# 创建椭圆形窗体

using System;using System.Drawing;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Data;using System.Drawing.Drawing2D;namespace Image{/// <summary>/// Form1 的摘要说明。/// </summary>public class Form1 : System.Windows.Forms.Form{private System.Windows.Forms.Button button1;/// <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 );}#region Windows 窗体设计器生成的代码/// <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(){this.button1 = new System.Windows.Forms.Button();this.SuspendLayout();// // button1// this.button1.BackColor = System.Drawing.Color.LightGray;this.button1.Location = new System.Drawing.Point(136, 88);this.button1.Name = "button1";this.button1.Size = new System.Drawing.Size(80, 23);this.button1.TabIndex = 0;this.button1.Text = "关闭程序";this.button1.Click = new System.EventHandler(this.button1_Click);// // Form1// this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);this.BackColor = System.Drawing.Color.Blue;this.ClientSize = new System.Drawing.Size(336, 198);this.Controls.Add(this.button1);this.MaximizeBox = false;this.Name = "Form1";this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;this.Text = "演示创建椭圆形窗体";this.Paint = new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);this.ResumeLayout(false);}#endregion/// <summary>/// 应用程序的主入口点。/// </summary>[STAThread]static void Main() {Application.Run(new Form1());}private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e){//创建椭圆形窗体//创建一个路径对象GraphicsPath MyPath=new GraphicsPath();//将椭圆添加到路径对象中MyPath.AddEllipse(20,30,this.Width-30,this.Height-40);//使用椭圆构造一个区域，并将此区域作为程序窗体区域this.Region=new Region(MyPath);}private void button1_Click(object sender, System.EventArgs e){//关闭程序this.Close();}}}