C# HookProc类代码示例

 protected GlobalHook(HookTypes hookType)
 {
     this.mHookType = HookTypes.NONE;
     this.mHandle = IntPtr.Zero;
     this.mProc = new HookProc(this.OnProc);
     this.mHookType = hookType;
 }

        public static void EnsureSubscribedToGlobalKeyboardEvents()
        {
            if (s_KeyboardHookHandle == 0)
            {
                //See comment of this field. To avoid GC to clean it up.
                s_KeyboardDelegate = KeyboardHookProc;

                s_KeyboardHookHandle = SetWindowsHookEx(
                      WH_KEYBOARD_LL,
                      s_KeyboardDelegate,
                      IntPtr.Zero,
                        // Marshal.GetHINSTANCE(                            Assembly.GetExecutingAssembly().GetModules()[0]),
                        0);

                if (s_KeyboardHookHandle == 0)
                {
                    //Returns the error code returned by the last unmanaged function called using platform invoke that has the DllImportAttribute.SetLastError flag set.
                    int errorCode = Marshal.GetLastWin32Error();
                    //do cleanup

                    //Initializes and throws a new instance of the Win32Exception class with the specified error.
                    throw new Win32Exception(errorCode);
                }
            }
        }

 public static IntPtr SetHook(int type, HookProc callback)
 {
     var process = Process.GetCurrentProcess();
     var module = process.MainModule;
     var handle = GetModuleHandle(module.ModuleName);
     return SetWindowsHookEx(type, callback, handle, 0);
 }

        public void Start()
        {
            if(_disposed)
                throw new ObjectDisposedException("This object is disposed");

            if (!IsStarted &&
                _hookType != 0)
            {

                // Make sure we keep a reference to this delegate!
                // If not, GC randomly collects it, and a NullReference exception is thrown
                _hookCallback = new HookProc(HookCallbackProcedure);

                _handleToHook = SetWindowsHookEx(
                    _hookType,
                    _hookCallback,
                    Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]),
                    0);

                // Were we able to sucessfully start hook?
                if (_handleToHook != 0)
                {
                    IsStarted = true;
                }

            }

        }

        private static void EnsureSubscribedToGlobalMouseEvents()
        {
            // install Mouse hook only if it is not installed and must be installed
            if (s_MouseHookHandle == 0)
            {
                //See comment of this field. To avoid GC to clean it up.
                s_MouseDelegate = MouseHookProc;
                //install hook
                var mar = LoadLibrary("user32.dll");
                s_MouseHookHandle = SetWindowsHookEx(
                    WH_MOUSE_LL,
                    s_MouseDelegate,
                    mar,
                    //Marshal.GetHINSTANCE(
                    //    Assembly.GetExecutingAssembly().GetModules()[0]),
                    0);
                //If SetWindowsHookEx fails.
                if (s_MouseHookHandle == 0)
                {
                    //Returns the error code returned by the last unmanaged function called using platform invoke that has the DllImportAttribute.SetLastError flag set.
                    int errorCode = Marshal.GetLastWin32Error();
                    //do cleanup

                    //Initializes and throws a new instance of the Win32Exception class with the specified error.
                    throw new Win32Exception(errorCode);
                }
            }
        }

 public void Start()
 {
     // 安装键盘钩子
     if (hKeyboardHook == 0)
     {
         KeyboardHookProcedure = new HookProc(KeyboardHookProc);
         //GetModuleHandle 函数 替代 Marshal.GetHINSTANCE
         //防止在 framework4.0中 注册钩子不成功
         //IntPtr modulePtr = GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName);
         //hKeyboardHook = SetWindowsHookEx(13, hookproc, modulePtr, 0);
         hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProcedure, GetModuleHandle(System.Diagnostics.Process.GetCurrentProcess().MainModule.ModuleName), 0);
         //hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0);
         //************************************ 
         //键盘线程钩子 
         //SetWindowsHookEx( 2,KeyboardHookProcedure, IntPtr.Zero, GetCurrentThreadId());//指定要监听的线程idGetCurrentThreadId(),
         //键盘全局钩子,需要引用空间(using System.Reflection;) 
         //SetWindowsHookEx( 13,MouseHookProcedure,Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]),0); 
         // 
         //关于SetWindowsHookEx (int idHook, HookProc lpfn, IntPtr hInstance, int threadId)函数将钩子加入到钩子链表中，说明一下四个参数： 
         //idHook 钩子类型，即确定钩子监听何种消息，上面的代码中设为2，即监听键盘消息并且是线程钩子，如果是全局钩子监听键盘消息应设为13， 
         //线程钩子监听鼠标消息设为7，全局钩子监听鼠标消息设为14。lpfn 钩子子程的地址指针。如果dwThreadId参数为0 或是一个由别的进程创建的 
         //线程的标识，lpfn必须指向DLL中的钩子子程。 除此以外，lpfn可以指向当前进程的一段钩子子程代码。钩子函数的入口地址，当钩子钩到任何 
         //消息后便调用这个函数。hInstance应用程序实例的句柄。标识包含lpfn所指的子程的DLL。如果threadId 标识当前进程创建的一个线程，而且子 
         //程代码位于当前进程，hInstance必须为NULL。可以很简单的设定其为本应用程序的实例句柄。threaded 与安装的钩子子程相关联的线程的标识符
         //如果为0，钩子子程与所有的线程关联，即为全局钩子
         //************************************ 
         //如果SetWindowsHookEx失败
         if (hKeyboardHook == 0)
         {
             Stop();
             throw new Exception("安装键盘钩子失败");
         }
     }
 }

 static MessageBoxEx()
 {
     HookProcdure = MessageBoxHookProc;
     HookTimer = MessageBoxTimerProc;
     _hookTimeout = 0;
     _hookCaption = null;
     _hHook = IntPtr.Zero;
 }

 static MessageBoxWithTimeout()
 {
     hookProc = new HookProc(MessageBoxHookProc);
     hookTimer = new TimerProc(MessageBoxTimerProc);
     hookTimeout = 0;
     hookCaption = null;
     hHook = IntPtr.Zero;
 }

 public void SetHook()
 {
     _keyboardHookDelegate = KeyboardHookProc;
     var cProcess = Process.GetCurrentProcess();
     var cModule = cProcess.MainModule;
     var mh = GetModuleHandle(cModule.ModuleName);
     _hHook = SetWindowsHookEx(WhKeyboardLl, _keyboardHookDelegate, mh, 0);
 }

 private static IntPtr SetHook(int hookType, HookProc hookProc)
 {
     using (Process currentProcess = Process.GetCurrentProcess())
     using (ProcessModule currentModule = currentProcess.MainModule)
     {
         return NativeMethods.SetWindowsHookEx(hookType, hookProc, NativeMethods.GetModuleHandle(currentModule.ModuleName), 0);
     }
 }

 internal HookBase(HookType type)
 {
     _hType = type;
     _hProc = new HookProc(HookProcBase);
     using (Process p = Process.GetCurrentProcess())
     using (ProcessModule pm = p.MainModule)
         _hHook = SetWindowsHookEx((int)_hType, _hProc, GetModuleHandle(pm.ModuleName), 0);
 }

 public CrossModeHook()
     : base(HookType.WH_MOUSE_LL)
 {
     m_filterFunc = new HookProc(this.MouseProc);
     timer = new Timer();
     timer.Interval = 250;
     timer.Tick += new EventHandler(timer_Tick);
 }

		public void SetHook()
		{
			MouseHookProcedure = new HookProc(MouseHookProc);
// ReSharper disable CSharpWarnings::CS0612
#pragma warning disable 618
			hHook = SetWindowsHookEx(WH_MOUSE, MouseHookProcedure, (IntPtr)0, AppDomain.GetCurrentThreadId());
#pragma warning restore 618
			// ReSharper restore CSharpWarnings::CS0612
		}

 private static void SetHook()//установление хука на клаву
 {
     if (s_KeyboardHookHandle == 0)
     {
         s_KeyboardDelegate = KeyboardHookProc;
         IntPtr hInstance = LoadLibrary("User32");
         s_KeyboardHookHandle = SetWindowsHookEx(WH_KEYBOARD_LL, s_KeyboardDelegate, hInstance, 0);
     }
 }

 internal HookHandle(HookType hookType, HookProc hookProc) : base(IntPtr.Zero, false)
 {
     GCHandle.Alloc(hookProc);
     handle = User32.SetWindowsHookEx(hookType, hookProc, IntPtr.Zero, IntPtr.Zero);
     if (handle == IntPtr.Zero)
     {
         IsInvalid = true;
     }
 }