C# 鼠标穿透窗体功能

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> 

        public void SetPenetrate()

        {

            GetWindowLong(this.Handle, GWL_EXSTYLE);

            SetWindowLong(this.Handle, GWL_EXSTYLE, WS_EX_TRANSPARENT | WS_EX_LAYERED);

            SetLayeredWindowAttributes(this.Handle, 0, 100, LWA_ALPHA);

        } 

View Code

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