设置窗体透明C#代码

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在原来代码上加入窗体透明，控件不透明代码：

 1 using System;  2 using System.Runtime.InteropServices;  3 using System.Windows.Forms;  4  5 namespace HoverTreeWinForm  6 {  7 public partial class FormHewenqi : Form  8 {  9 10 /// <summary> 11 /// 使窗体透明 by 何问起 12 /// </summary> 13 protected override CreateParams CreateParams 14 { 15 get 16 { 17 18 CreateParams parameter = base.CreateParams; 19 parameter.ExStyle |= 0x00080000; 20 return parameter; 21 22 } 23 } 24 25 /// <summary> 26 /// http://hovertree.com/h/bjaf/v4y0b2l6.htm 27 /// </summary> 28 /// <returns></returns> 29 [DllImport("User32.dll")] 30 public static extern int MessageBox(int h, string m, string c, int type); 31 public FormHewenqi() 32 { 33 InitializeComponent(); 34 //使控件不透明 35 this.TransparencyKey = BackColor; 36 } 37 38 private void button_hewenqi_Click(object sender, EventArgs e) 39 { 40 MessageBox(0, "Hello Win32 API HoverTree", "何问起网", 4); 41 } 42 43 private void linkLabel_help_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e) 44 { 45 System.Diagnostics.Process.Start("http://hovertree.com/h/bjaf/v4y0b2l6.htm"); 46 } 47 48 private void button_hoverc_Click(object sender, EventArgs e) 49 { 50 //获取主窗体句柄 51 IntPtr h_handle = HewenqiUser32.GetCurrentWindowHandle(); 52 int h_jubing = 0; ; 53 if (h_handle != IntPtr.Zero) 54 h_jubing = (int)(h_handle); 55 MessageBox(h_jubing, "Hello hovertree.com", "欢迎光临何问起", 4); 56 } 57 } 58 }