C 鼠标全局钩子

/// 
 /// 鼠标全局钩子 /// 
 public class MouseHook { private const int WM_MOUSEMOVE = 0x200; private const int WM_LBUTTONDOWN = 0x201; private const int WM_RBUTTONDOWN = 0x204; private const int WM_MBUTTONDOWN = 0x207; private const int WM_LBUTTONUP = 0x202; private const int WM_RBUTTONUP = 0x205; private const int WM_MBUTTONUP = 0x208; private const int WM_LBUTTONDBLCLK = 0x203; private const int WM_RBUTTONDBLCLK = 0x206; private const int WM_MBUTTONDBLCLK = 0x209; /// 
 /// 点 /// 
 [StructLayout(LayoutKind.Sequential)] public class POINT { public int x; public int y; } /// 
 /// 钩子结构体 /// 
 [StructLayout(LayoutKind.Sequential)] public class MouseHookStruct { public POINT pt; public int hWnd; public int wHitTestCode; public int dwExtraInfo; } public const int WH_MOUSE_LL = 14; // mouse hook constant // 装置钩子的函数 [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId); // 卸下钩子的函数 [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] public static extern bool UnhookWindowsHookEx(int idHook); // 下一个钩挂的函数 [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam); // 全局的鼠标事件 public event MouseEventHandler OnMouseActivity; // 钩子回调函数 public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam); // 声明鼠标钩子事件类型 private HookProc _mouseHookProcedure; private static int _hMouseHook = 0; // 鼠标钩子句柄 /// 
 /// 构造函数 /// 
 public MouseHook() { } /// 
 /// 析构函数 /// 
 ~MouseHook() { Stop(); } /// 
 /// 启动全局钩子 /// 
 public void Start() { // 安装鼠标钩子 if (_hMouseHook == 0) { // 生成一个HookProc的实例. _mouseHookProcedure = new HookProc(MouseHookProc); _hMouseHook = SetWindowsHookEx(WH_MOUSE_LL, _mouseHookProcedure, Marshal.GetHINSTANCE(System.Reflection.Assembly.GetExecutingAssembly().GetModules()[0]), 0); //如果装置失败停止钩子 if (_hMouseHook == 0) { Stop(); throw new Exception("SetWindowsHookEx failed."); } } } /// 
 /// 停止全局钩子 /// 
 public void Stop() { bool retMouse = true; if (_hMouseHook != 0) { retMouse = UnhookWindowsHookEx(_hMouseHook); _hMouseHook = 0; } // 如果卸下钩子失败 if (!(retMouse)) throw new Exception("UnhookWindowsHookEx failed."); } /// 
 /// 鼠标钩子回调函数 /// 
 private int MouseHookProc(int nCode, Int32 wParam, IntPtr lParam) { // 如果正常运行并且用户要监听鼠标的消息 if ((nCode >= 0) && (OnMouseActivity != null)) { MouseButtons button = MouseButtons.None; int clickCount = 0; switch (wParam) { case WM_LBUTTONDOWN: button = MouseButtons.Left; clickCount = 1; break; case WM_LBUTTONUP: button = MouseButtons.Left; clickCount = 1; break; case WM_LBUTTONDBLCLK: button = MouseButtons.Left; clickCount = 2; break; case WM_RBUTTONDOWN: button = MouseButtons.Right; clickCount = 1; break; case WM_RBUTTONUP: button = MouseButtons.Right; clickCount = 1; break; case WM_RBUTTONDBLCLK: button = MouseButtons.Right; clickCount = 2; break; } // 从回调函数中得到鼠标的信息 MouseHookStruct MyMouseHookStruct = (MouseHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseHookStruct)); MouseEventArgs e = new MouseEventArgs(button, clickCount, MyMouseHookStruct.pt.x, MyMouseHookStruct.pt.y, 0); // 如果想要限制鼠标在屏幕中的移动区域可以在此处设置 // 后期需要考虑实际的x、y的容差 if(!Screen.PrimaryScreen.Bounds.Contains(e.X, e.Y)) { //return 1; } OnMouseActivity(this, e); } // 启动下一次钩子 return CallNextHookEx(_hMouseHook, nCode, wParam, lParam); } }