怎么设置winfrom窗体透明背景？

Question

窗体

Answer 1

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;namespace winform
{
     public partial class Form1 : Form
     {
         public Form1()
         {             this.Location = new Point(100, 100);
             this.Cursor = System.Windows.Forms.Cursors.Hand;// 定义在窗体上，光标显示为手形
             this.Text = "透明窗体";
             this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;// 定义窗体的开始显示位置是屏幕的中间
             this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Fixed3D;
             this.ForeColor = System.Drawing.SystemColors.Desktop;
             this.Font = new System.Drawing.Font("宋体", 9);
             this.BackColor = System.Drawing.Color.Blue;
             this.ClientSize = new Size(440, 170);             this.Opacity = 0.1;
         }         public static void Main()
         {
             Application.Run(new Form1());
         }
     }
}

Answer 2

其实就是设置Opacity 的值;

Answer 3

this.Opacity = 0.3; //( 0-1 之间就行了)

Answer 4

我只想让 窗体透明， 控件不透明，行吗？比如说图片，picBox ,label 上的文字

Answer 5

http://www.cnblogs.com/Allnen/archive/2007/12/25/1014490.html

Answer 6

this.FormBorderStyle = FormBorderStyle.None; 
this.TransparencyKey = this.BackColor;

Answer 7

form.TransparencyKey =form.BackColor;
控件的话 需要 你 设置前景色