C#-窗体鼠标穿透

最新推荐文章于 2025-07-24 11:31:15 发布

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最新推荐文章于 2025-07-24 11:31:15 发布 · 1.8k 阅读

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CC 4.0 BY-SA版权

本文档介绍如何在C#中实现窗体的鼠标穿透效果，通过设置窗体的WS_EX_TRANSPARENT和WS_EX_LAYERED风格，并使用SetWindowLong、GetWindowLong和SetLayeredWindowAttributes等API函数，使窗体变得透明并允许鼠标穿透。

 #region 窗体鼠标穿透
        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>
        /// 声明委托类
        /// </summary>
        /// <param name="MsgStr"></param>