【转】C#.Net 鼠标和键盘全局监控勾子(hook )

【转】C#.Net 鼠标和键盘全局监控勾子(hook )

//C#鼠标和键盘全局监控hook
using System;
using System.Runtime.InteropServices;
using System.Reflection;
using System.Threading;
using System.Windows.Forms;
using System.ComponentModel;

namespace ScreenCapyure2
{
    public class UserActivityHook
    {
        #region Windows structure definitions

        [StructLayout(LayoutKind.Sequential)]
        private class POINT
        {
            public int x;
            public int y;
        }

        [StructLayout(LayoutKind.Sequential)]
        private class MouseHookStruct
        {
            public POINT pt;
            public int hwnd;
            public int wHitTestCode;
            public int dwExtraInfo;
        }

        [StructLayout(LayoutKind.Sequential)]
        private class MouseLLHookStruct
        {
            public POINT pt;
            public int mouseData;
            public int flags;
            public int time;
            public int dwExtraInfo;
        }

        [StructLayout(LayoutKind.Sequential)]
        private class KeyboardHookStruct
        {
            public int vkCode;
            public int scanCode;
            public int flags;
            public int time;
            public int dwExtraInfo;
        }
        #endregion

        #region Windows function imports

        [DllImport("user32.dll", CharSet = CharSet.Auto,
           CallingConvention = CallingConvention.StdCall, SetLastError = true)]
        private static extern int SetWindowsHookEx(
            int idHook,
            HookProc lpfn,
            IntPtr hMod,
            int dwThreadId);

        [DllImport("user32.dll", CharSet = CharSet.Auto,
            CallingConvention = CallingConvention.StdCall, SetLastError = true)]
        private static extern int UnhookWindowsHookEx(int idHook);

        [DllImport("user32.dll", CharSet = CharSet.Auto,
             CallingConvention = CallingConvention.StdCall)]
        private static extern int CallNextHookEx(
            int idHook,
            int nCode,
            int wParam,
            IntPtr lParam);

        private delegate int HookProc(int nCode, int wParam, IntPtr lParam);

        [DllImport("user32")]
        private static extern int ToAscii(
            int uVirtKey,
            int uScanCode,
            byte[] lpbKeyState,
            byte[] lpwTransKey,
            int fuState);

        [DllImport("user32")]
        private static extern int GetKeyboardState(byte[] pbKeyState);

        [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        private static extern short GetKeyState(int vKey);

        #endregion

        #region Windows constants

        private const int WH_MOUSE_LL = 14;
        private const int WH_KEYBOARD_LL = 13;
        private const int WH_MOUSE = 7;
        private const int WH_KEYBOARD = 2;
        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;
        private const int WM_MOUSEWHEEL = 0x020A;
        private const int WM_KEYDOWN = 0x100;
        private const int WM_KEYUP = 0x101;
        private const int WM_SYSKEYDOWN = 0x104;
        private const int WM_SYSKEYUP = 0x105;

        private const byte VK_SHIFT = 0x10;
        private const byte VK_CAPITAL = 0x14;
        private const byte VK_NUMLOCK = 0x90;

        #endregion

        public UserActivityHook()
        {
            Start();
        }

        public UserActivityHook(bool InstallMouseHook, bool InstallKeyboardHook)
        {
            Start(InstallMouseHook, InstallKeyboardHook);
        }

        ~UserActivityHook()
        {
            Stop(true, true, false);
        }

        public event MouseEventHandler OnMouseActivity;
        public event KeyEventHandler KeyDown;
        public event KeyPressEventHandler KeyPress;
        public event KeyEventHandler KeyUp;

        private int hMouseHook = 0;
        private int hKeyboardHook = 0;

        private static HookProc MouseHookProcedure;
        private static HookProc KeyboardHookProcedure;
        public void Start()
        {
            this.Start(true, true);
        }
        public void Start(bool InstallMouseHook, bool InstallKeyboardHook)
        {
            if (hMouseHook == 0 && InstallMouseHook)
            {
                MouseHookProcedure = new HookProc(MouseHookProc);
                hMouseHook = SetWindowsHookEx(
                    WH_MOUSE_LL,
                    MouseHookProcedure,
                    Marshal.GetHINSTANCE(
                        Assembly.GetExecutingAssembly().GetModules()[0]),
                    0);
                if (hMouseHook == 0)
                {
                    int errorCode = Marshal.GetLastWin32Error();
                    Stop(true, false, false);
                    try
                    { throw new Win32Exception(errorCode); }
                    catch
                    { }
                }
            }
            if (hKeyboardHook == 0 && InstallKeyboardHook)
            {
                KeyboardHookProcedure = new HookProc(KeyboardHookProc);
                hKeyboardHook = SetWindowsHookEx(
                    WH_KEYBOARD_LL,
                    KeyboardHookProcedure,
                    Marshal.GetHINSTANCE(
                    Assembly.GetExecutingAssembly().GetModules()[0]),
                    0);
                if (hKeyboardHook == 0)
                {
                    int errorCode = Marshal.GetLastWin32Error();
                    Stop(false, true, false);
                    try
                    {
                        throw new Win32Exception(errorCode);
                    }
                    catch { }
                }
            }
        }

        public void Stop()
        {
            this.Stop(true, true, true);
        }

        public void Stop(bool UninstallMouseHook, bool UninstallKeyboardHook, bool ThrowExceptions)
        {
            if (hMouseHook != 0 && UninstallMouseHook)
            {
                int retMouse = UnhookWindowsHookEx(hMouseHook);
                hMouseHook = 0;
                if (retMouse == 0 && ThrowExceptions)
                {
                    int errorCode = Marshal.GetLastWin32Error();
                    throw new Win32Exception(errorCode);
                }
            }
            if (hKeyboardHook != 0 && UninstallKeyboardHook)
            {
                int retKeyboard = UnhookWindowsHookEx(hKeyboardHook);
                hKeyboardHook = 0;
                if (retKeyboard == 0 && ThrowExceptions)
                {
                    int errorCode = Marshal.GetLastWin32Error();
                    throw new Win32Exception(errorCode);
                }
            }
        }

        private int MouseHookProc(int nCode, int wParam, IntPtr lParam)
        {
            if ((nCode >= 0) && (OnMouseActivity != null))
            {
                MouseLLHookStruct mouseHookStruct = (MouseLLHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseLLHookStruct));
                MouseButtons button = MouseButtons.None;
                short mouseDelta = 0;
                switch (wParam)
                {
                    case WM_LBUTTONDOWN:
                        button = MouseButtons.Left;
                        break;
                    case WM_RBUTTONDOWN:
                        button = MouseButtons.Right;
                        break;
                    case WM_MOUSEWHEEL:
                        mouseDelta = (short)((mouseHookStruct.mouseData >> 16) & 0xffff);
                        break;
                }
                int clickCount = 0;
                if (button != MouseButtons.None)
                    if (wParam == WM_LBUTTONDBLCLK || wParam == WM_RBUTTONDBLCLK) clickCount = 2;
                    else clickCount = 1;
                MouseEventArgs e = new MouseEventArgs(
                                                   button,
                                                   clickCount,
                                                   mouseHookStruct.pt.x,
                                                   mouseHookStruct.pt.y,
                                                   mouseDelta);
                OnMouseActivity(this, e);
            }
            return CallNextHookEx(hMouseHook, nCode, wParam, lParam);
        }
        private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)
        {
            bool handled = false;
            if ((nCode >= 0) && (KeyDown != null || KeyUp != null || KeyPress != null))
            {
                KeyboardHookStruct MyKeyboardHookStruct = (KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardHookStruct));
                if (KeyDown != null && (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN))
                {
                    Keys keyData = (Keys)MyKeyboardHookStruct.vkCode;
                    KeyEventArgs e = new KeyEventArgs(keyData);
                    KeyDown(this, e);
                    handled = handled || e.Handled;
                }
                if (KeyPress != null && wParam == WM_KEYDOWN)
                {
                    bool isDownShift = ((GetKeyState(VK_SHIFT) & 0x80) == 0x80 ? true : false);
                    bool isDownCapslock = (GetKeyState(VK_CAPITAL) != 0 ? true : false);

                    byte[] keyState = new byte[256];
                    GetKeyboardState(keyState);
                    byte[] inBuffer = new byte[2];
                    if (ToAscii(MyKeyboardHookStruct.vkCode,
                              MyKeyboardHookStruct.scanCode,
                              keyState,
                              inBuffer,
                              MyKeyboardHookStruct.flags) == 1)
                    {
                        char key = (char)inBuffer[0];
                        if ((isDownCapslock ^ isDownShift) && Char.IsLetter(key)) key = Char.ToUpper(key);
                        KeyPressEventArgs e = new KeyPressEventArgs(key);
                        KeyPress(this, e);
                        handled = handled || e.Handled;
                    }
                }
                if (KeyUp != null && (wParam == WM_KEYUP || wParam == WM_SYSKEYUP))
                {
                    Keys keyData = (Keys)MyKeyboardHookStruct.vkCode;
                    KeyEventArgs e = new KeyEventArgs(keyData);
                    KeyUp(this, e);
                    handled = handled || e.Handled;
                }

            }
            if (handled)
                return 1;
            else
                return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);
        }
    }
}

//////////////////////

可以把以上程序单独存为一个文件如：SC.CS;然后在项目里“添加现有项”找到该文件

记住引用

using ScreenCapyure2;

//以下为在窗体中监视事件
//本程序调试不起作用，运行时才起作用

 

UserActivityHook choosesc;
choosesc = new UserActivityHook();
             choosesc.OnMouseActivity += new MouseEventHandler(choose_OnMouseActivity);
             choosesc.KeyDown += new KeyEventHandler(MyKeyDown);
             choosesc.KeyPress += new KeyPressEventHandler(MyKeyPress);
             choosesc.KeyUp += new KeyEventHandler(MyKeyUp);

//上面部分写到 InitializeComponent()后面

public void MyKeyDown(object sender, KeyEventArgs e)
         {
         }

         public void MyKeyPress(object sender, KeyPressEventArgs e)
         {
         }

         public void MyKeyUp(object sender, KeyEventArgs e)
         {
         }

 

private void choose_OnMouseActivity(object sender, MouseEventArgs e)
          {
              if (e.Clicks > 0)
              {
                  if ((MouseButtons)(e.Button) == MouseButtons.Left)
                  {
                      point[0] = e.Location;
                  }
                  if ((MouseButtons)(e.Button) == MouseButtons.Right)
                  {
                      point[1] = e.Location;
                  }
              }
              //throw new Exception("The method or operation is not implemented.");
          }