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); }