VSTO Office二次开发应用程序键盘鼠标钩子

可能在使用VSTO技术对Office的相关程序进行操作时，会碰到用程序去控制一些快捷键的操作，可以对键盘进行挂钩，此时使用P/Invoke函数实现。

原文链接：《VSTO应用程序中加入键盘钩子》 http://www.cnblogs.com/2018/archive/2010/12/01/1893891.html

原文如下：
在VSTO应用程序中有时为了处理一些快捷按键操作等实现一些特殊的功能，此时需要对键盘进行挂钩，此时使用P/Invoke函数实现，参考如下：
VSTO加载和卸载时进行钩子的初始化和卸载

代码  KeyboardHook hook;        private void ThisAddIn_Startup(object sender, System.EventArgs e)        {           hook = new KeyboardHook();            hook.InitHook();        }         private void ThisAddIn_Shutdown(object sender, System.EventArgs e)        {            hook.UnHook();        }    } //钩子具体处理逻辑是：    class KeyboardHook    {        #region (invokestuff)        [DllImport("kernel32.dll")]        static extern uint GetCurrentThreadId();        [DllImport("user32.dll")]        static extern IntPtr SetWindowsHookEx(int code, HookProcKeyboard func, IntPtr hInstance, uint threadID);        [DllImport("user32.dll")]        static extern bool UnhookWindowsHookEx(IntPtr hhk);        [DllImport("user32.dll")]        static extern int CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);        #endregion         #region constans        private const int WH_KEYBOARD = 2;        private const int HC_ACTION = 0;        #endregion         delegate int HookProcKeyboard(int code, IntPtr wParam, IntPtr lParam);        private HookProcKeyboard KeyboardProcDelegate = null;        private IntPtr khook;        bool doing = false;         public void InitHook()        {            uint id = GetCurrentThreadId();            //init the keyboard hook with the thread id of the Visual Studio IDE               this.KeyboardProcDelegate = new HookProcKeyboard(this.KeyboardProc);            khook = SetWindowsHookEx(WH_KEYBOARD, this.KeyboardProcDelegate, IntPtr.Zero, id);        }         public void UnHook()        {            if (khook != IntPtr.Zero)            {                UnhookWindowsHookEx(khook);            }        }        private int KeyboardProc(int code, IntPtr wParam, IntPtr lParam)        {            try            {                if (code != HC_ACTION)                {                    return CallNextHookEx(khook, code, wParam, lParam);                }                 if ((int)wParam == (int)Keys.Z && ((int)lParam & (int)Keys.Alt) != 0)                {                    if (!doing)                    {                        doing = true;                        MessageBox.Show("Captured");                        doing = false;                    }                }            }            catch            {            }             return CallNextHookEx(khook, code, wParam, lParam);        }    }

注意对于命名空间的引入，在程序中Keys.Z，Keys.Alt可以改为你想要控制的按键键盘，可以是是单一按键也可以是组合键。当然，也可以捕获复制、粘贴、撤销等等组合快捷键。

对于键盘、鼠标钩子的处理：《C#鼠标键盘钩子》http://blog.csdn.net/wangyong0921/article/details/8262631

对于键盘钩子的另一种处理：

using System;using System.Collections.Generic;using System.Reflection;using System.Runtime.InteropServices;using System.Text;using System.Windows.Forms;namespace ICS.Common{    ///   <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);        }    }

对于鼠标钩子的处理：

using System;using System.Collections.Generic;using System.Reflection;using System.Runtime.InteropServices;using System.Text;using System.Windows.Forms;namespace PowerPointTest{    /// <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);        }    }}