首页 > 技术文章 > C# 鼠标穿透窗体功能

mqxs 2013-10-06 10:33 原文

通过以下代码,在窗体启动后调用方法SetPenetrate() 即可实现窗体的穿透功能。

同样该功能需要加载命名空间

using System.Runtime.InteropServices;

     private const uint WS_EX_LAYERED = 0x80000;
        private const int WS_EX_TRANSPARENT = 0x20;
        private const int GWL_STYLE = (-16);
        private const int GWL_EXSTYLE = (-20);
        private const int LWA_ALPHA = 0;
 
        [DllImport("user32", EntryPoint = "SetWindowLong")]
        private static extern uint SetWindowLong(
        IntPtr hwnd,
        int nIndex,
        uint dwNewLong
        );
 
        [DllImport("user32", EntryPoint = "GetWindowLong")]
        private static extern uint GetWindowLong(
        IntPtr hwnd,
        int nIndex
        );
 
        [DllImport("user32", EntryPoint = "SetLayeredWindowAttributes")]
        private static extern int SetLayeredWindowAttributes(
        IntPtr hwnd,
        int crKey,
        int bAlpha,
        int dwFlags
        );
  /// <summary>
  /// 设置窗体具有鼠标穿透效果
  /// </summary>
  /// <param name="flag">true穿透,false不穿透</param>
  public void SetPenetrate(bool flag = true)
  {
    uint style = GetWindowLong(this.Handle, GWL_EXSTYLE);
    if (flag)
      SetWindowLong(this.Handle, GWL_EXSTYLE, style | WS_EX_TRANSPARENT | WS_EX_LAYERED);
    else
      SetWindowLong(this.Handle, GWL_EXSTYLE, style & ~(WS_EX_TRANSPARENT | WS_EX_LAYERED));
    SetLayeredWindowAttributes(this.Handle, 0, 100, LWA_ALPHA);
  }


原文地址:http://bbs.csdn.net/topics/390325341

推荐阅读