原文出自:http://www.cnblogs.com/iEgrhn/archive/2008/02/17/1071392.html
using System; using System.Collections.Generic; using System.Reflection; using System.Runtime.InteropServices; using System.Text; using System.Windows.Forms; namespace DCIEngine.FrameWork.Snap { /// <summary> /// 这个类可以让你得到一个在运行中程序的所有键盘或鼠标事件 /// 并且引发一个带KeyEventArgs参数的.NET事件以便你很容易使用这些信息 /// </summary> public class KeyBordHook { private const int WM_KEYDOWN = 0x100; private const int WM_KEYUP = 0x101; private const int WM_SYSKEYDOWN = 0x104; private const int WM_SYSKEYUP = 0x105; //全局的事件 public event KeyEventHandler OnKeyDownEvent; public event KeyEventHandler OnKeyUpEvent; public event KeyPressEventHandler OnKeyPressEvent; static int hKeyboardHook = 0; //键盘钩子句柄 //鼠标常量 public const int WH_KEYBOARD_LL = 13; //keyboard hook constant HookProc KeyboardHookProcedure; //声明键盘钩子事件类型. //声明键盘钩子的封送结构类型 [StructLayout(LayoutKind.Sequential)] public class KeyboardHookStruct { public int vkCode; //表示一个在1到254间的虚似键盘码 public int scanCode; //表示硬件扫描码 public int flags; public int time; public int dwExtraInfo; } //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); [DllImport("user32 ")] public static extern int ToAscii(int uVirtKey, int uScanCode, byte[] lpbKeyState, byte[] lpwTransKey, int fuState); [DllImport("user32 ")] public static extern int GetKeyboardState(byte[] pbKeyState); public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam); /// <summary> /// 墨认的构造函数构造当前类的实例并自动的运行起来. /// </summary> public KeyBordHook() { Start(); } //析构函数. ~KeyBordHook() { Stop(); } public void Start() { //安装键盘钩子 if (hKeyboardHook == 0) { KeyboardHookProcedure = new HookProc(KeyboardHookProc); hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().ManifestModule), 0); if (hKeyboardHook == 0) { Stop(); throw new Exception("SetWindowsHookEx ist failed. "); } } } public void Stop() { bool retKeyboard = true; if (hKeyboardHook != 0) { retKeyboard = UnhookWindowsHookEx(hKeyboardHook); hKeyboardHook = 0; } //如果卸下钩子失败 if (!(retKeyboard)) throw new Exception("UnhookWindowsHookEx failed. "); } private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam) { if ((nCode >= 0) && (OnKeyDownEvent != null || OnKeyUpEvent != null || OnKeyPressEvent != null)) { KeyboardHookStruct MyKeyboardHookStruct = (KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardHookStruct)); //引发OnKeyDownEvent if (OnKeyDownEvent != null && (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN)) { Keys keyData = (Keys)MyKeyboardHookStruct.vkCode; KeyEventArgs e = new KeyEventArgs(keyData); OnKeyDownEvent(this, e); } //引发OnKeyPressEvent if (OnKeyPressEvent != null && wParam == WM_KEYDOWN) { byte[] keyState = new byte[256]; GetKeyboardState(keyState); byte[] inBuffer = new byte[2]; if (ToAscii(MyKeyboardHookStruct.vkCode, MyKeyboardHookStruct.scanCode, keyState, inBuffer, MyKeyboardHookStruct.flags) == 1) { KeyPressEventArgs e = new KeyPressEventArgs((char)inBuffer[0]); OnKeyPressEvent(this, e); } } //引发OnKeyUpEvent if (OnKeyUpEvent != null && (wParam == WM_KEYUP || wParam == WM_SYSKEYUP)) { Keys keyData = (Keys)MyKeyboardHookStruct.vkCode; KeyEventArgs e = new KeyEventArgs(keyData); OnKeyUpEvent(this, e); } } return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam); } } /// <summary> /// 这个类可以让你得到一个在运行中程序的所有鼠标事件 /// 并且引发一个带MouseEventArgs参数的.NET鼠标事件以便你很容易使用这些信息 /// </summary> 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; //全局的事件 public event MouseEventHandler OnMouseActivity; static int hMouseHook = 0; //鼠标钩子句柄 //鼠标常量 public const int WH_MOUSE_LL = 14; //mouse hook constant HookProc MouseHookProcedure; //声明鼠标钩子事件类型. //声明一个Point的封送类型 [StructLayout(LayoutKind.Sequential)] public class POINT { public int x; public int y; } //声明鼠标钩子的封送结构类型 [StructLayout(LayoutKind.Sequential)] public class MouseHookStruct { public POINT pt; public int hWnd; public int wHitTestCode; public int dwExtraInfo; } //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); public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam); /// <summary> /// 墨认的构造函数构造当前类的实例. /// </summary> public MouseHook() { //Start(); } //析构函数. ~MouseHook() { Stop(); } 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(Assembly.GetExecutingAssembly().GetModules()[0]), 0); //如果装置失败停止钩子 if (hMouseHook == 0) { Stop(); throw new Exception("SetWindowsHookEx failed. "); } } } 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. "); } 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); OnMouseActivity(this, e); } return CallNextHookEx(hMouseHook, nCode, wParam, lParam); } } }
在VS中直接运行，HOOK将会失败。
必须生成Release然后直接运行EXE才能生效。。
如果失败的话，可以把回调寒函数设置成静态的