C#中使用鉤子控制鼠標實現代碼

  工作中有這樣的需求某個控件panel的子控件textbox要實現只留鼠標右鍵copy注意同時還不能影響其它panel的子控件textbox怎麼辦？
答案是只有用鉤子在codeporject上找到這麼一個鉤子

　　如圖所示第一個文本框只有copy功能

　　

　　UserActivityHookcs

　　
using System;
using SystemRuntimeInteropServices;
using SystemReflection;
using SystemThreading;
using SystemWindowsForms;
using SystemComponentModel;

　　namespace gmaSystemWindows
{
 /// <summary>
 /// This class allows you to tap keyboard and mouse and / or to detect their activity even when an
 /// application runes in background or does not have any user interface at all This class raises
 /// common NET events with KeyEventArgs and MouseEventArgs so you can easily retrieve any information you need
 /// </summary>
 public class UserActivityHook
 {
  #region Windows structure definitions

　　/// <summary>
  /// The POINT structure defines the x and y coordinates of a point
  /// </summary>
  /// <remarks>
  /// ?url=/library/enus/gdi/rectangl_tiqasp
  /// </remarks>
  [StructLayout(LayoutKindSequential)]
   private class POINT
  {
   /// <summary>
   /// Specifies the xcoordinate of the point
   /// </summary>
   public int x;
   /// <summary>
   /// Specifies the ycoordinate of the point
   /// </summary>
   public int y;
  }

　　/// <summary>
  /// The MOUSEHOOKSTRUCT structure contains information about a mouse event passed to a WH_MOUSE hook procedure MouseProc
  /// </summary>
  /// <remarks>
  /// ?url=/library/enus/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookstructures/cwpstructasp
  /// </remarks>
  [StructLayout(LayoutKindSequential)]
   private class MouseHookStruct
  {
   /// <summary>
   /// Specifies a POINT structure that contains the x and ycoordinates of the cursor in screen coordinates
   /// </summary>
   public POINT pt;
   /// <summary>
   /// Handle to the window that will receive the mouse message corresponding to the mouse event [Page]
   /// </summary>
   public int hwnd;
   /// <summary>
   /// Specifies the hittest value For a list of hittest values see the description of the WM_NCHITTEST message
   /// </summary>
   public int wHitTestCode;
   /// <summary>
   /// Specifies extra information associated with the message
   /// </summary>
   public int dwExtraInfo;
  }

　　/// <summary>
  /// The MSLLHOOKSTRUCT structure contains information about a lowlevel keyboard input event
  /// </summary>
  [StructLayout(LayoutKindSequential)]
   private class MouseLLHookStruct
  {
   /// <summary>
   /// Specifies a POINT structure that contains the x and ycoordinates of the cursor in screen coordinates
   /// </summary>
   public POINT pt;
   /// <summary>
   /// If the message is WM_MOUSEWHEEL the highorder word of this member is the wheel delta
   /// The loworder word is reserved A positive value indicates that the wheel was rotated forward
   /// away from the user; a negative value indicates that the wheel was rotated backward toward the user
   /// One wheel click is defined as WHEEL_DELTA which is
   ///If the message is WM_XBUTTONDOWN WM_XBUTTONUP WM_XBUTTONDBLCLK WM_NCXBUTTONDOWN WM_NCXBUTTONUP
   /// or WM_NCXBUTTONDBLCLK the highorder word specifies which X button was pressed or released
   /// and the loworder word is reserved This value can be one or more of the following values Otherwise mouseData is not used
   ///XBUTTON
   ///The first X button was pressed or released

　　///XBUTTON
   ///The second X button was pressed or released
   /// </summary>
   public int mouseData;
   /// <summary>
   /// Specifies the eventinjected flag An application can use the following value to test the mouse flags Value Purpose
   ///LLMHF_INJECTED Test the eventinjected flag 
   ///
   ///Specifies whether the event was injected The value is if the event was injected; otherwise it is [Page]
   ///
   ///Reserved
   /// </summary>
   public int flags;
   /// <summary>
   /// Specifies the time stamp for this message
   /// </summary>
   public int time;
   /// <summary>
   /// Specifies extra information associated with the message
   /// </summary>
   public int dwExtraInfo;
  }

　　/// <summary>
  /// The KBDLLHOOKSTRUCT structure contains information about a lowlevel keyboard input event
  /// </summary>
  /// <remarks>
  /// ?url=/library/enus/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookstructures/cwpstructasp
  /// </remarks>
  [StructLayout(LayoutKindSequential)]
   private class KeyboardHookStruct
  {
   /// <summary>
   /// Specifies a virtualkey code The code must be a value in the range to
   /// </summary>
   public int vkCode;
   /// <summary>
   /// Specifies a hardware scan code for the key
   /// </summary>
   public int scanCode;
   /// <summary>
   /// Specifies the extendedkey flag eventinjected flag context code and transitionstate flag
   /// </summary>
   public int flags;
   /// <summary>
   /// Specifies the time stamp for this message
   /// </summary>
   public int time;
   /// <summary>
   /// Specifies extra information associated with the message
   /// </summary>
   public int dwExtraInfo;
  }
  #endregion

  #region Windows function imports
  /// <summary>
  /// The SetWindowsHookEx function installs an applicationdefined hook procedure into a hook chain
  /// You would install a hook procedure to monitor the system for certain types of events These events
  /// are associated either with a specific thread or with all threads in the same desktop as the calling thread
  /// </summary>[Page]
  /// <param name=\idHook\>
  /// [in] Specifies the type of hook procedure to be installed This parameter can be one of the following values
  /// </param>
  /// <param name=\lpfn\>
  /// [in] Pointer to the hook procedure If the dwThreadId parameter is zero or specifies the identifier of a
  /// thread created by a different process the lpfn parameter must point to a hook procedure in a dynamiclink
  /// library (DLL) Otherwise lpfn can point to a hook procedure in the code associated with the current process
  /// </param>
  /// <param name=\hMod\>
  /// [in] Handle to the DLL containing the hook procedure pointed to by the lpfn parameter
  /// The hMod parameter must be set to NULL if the dwThreadId parameter specifies a thread created by
  /// the current process and if the hook procedure is within the code associated with the current process
  /// </param>
  /// <param name=\dwThreadId\>
  /// [in] Specifies the identifier of the thread with which the hook procedure is to be associated
  /// If this parameter is zero the hook procedure is associated with all existing threads running in the
  /// same desktop as the calling thread
  /// </param>
  /// <returns>
  /// If the function succeeds the return value is the handle to the hook procedure
  /// If the function fails the return value is NULL To get extended error information call GetLastError
  /// </returns>
  /// <remarks>

　　/// ?url=/library/enus/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookfunctions/setwindowshookexasp
  /// </remarks>
  [DllImport(\userdll\ CharSet = CharSetAuto
    CallingConvention = CallingConventionStdCall SetLastError = true)]
  private static extern int SetWindowsHookEx(
   int idHook
   HookProc lpfn
   IntPtr hMod
   int dwThreadId);

　　/// <summary>
  /// The UnhookWindowsHookEx function removes a hook procedure installed in a hook chain by the SetWindowsHookEx function
  /// </summary>
  /// <param name=\idHook\>
  /// [in] Handle to the hook to be removed This parameter is a hook handle obtained by a previous call to SetWindowsHookEx [Page]
  /// </param>
  /// <returns>
  /// If the function succeeds the return value is nonzero
  /// If the function fails the return value is zero To get extended error information call GetLastError
  /// </returns>
  /// <remarks>
  /// ?url=/library/enus/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookfunctions/setwindowshookexasp
  /// </remarks>
  [DllImport(\userdll\ CharSet = CharSetAuto
    CallingConvention = CallingConventionStdCall SetLastError = true)]
  private static extern int UnhookWindowsHookEx(int idHook);

　　/// <summary>
  /// The CallNextHookEx function passes the hook information to the next hook procedure in the current hook chain
  /// A hook procedure can call this function either before or after processing the hook information
  /// </summary>
  /// <param name=\idHook\>Ignored</param>
  /// <param name=\nCode\>
  /// [in] Specifies the hook code passed to the current hook procedure
  /// The next hook procedure uses this code to determine how to process the hook information
  /// </param>
  /// <param name=\wParam\>
  /// [in] Specifies the wParam value passed to the current hook procedure
  /// The meaning of this parameter depends on the type of hook associated with the current hook chain
  /// </param>
  /// <param name=\lParam\>
  /// [in] Specifies the lParam value passed to the current hook procedure
  /// The meaning of this parameter depends on the type of hook associated with the current hook chain
  /// </param>
  /// <returns>
  /// This value is returned by the next hook procedure in the chain
  /// The current hook procedure must also return this value The meaning of the return value depends on the hook type
  /// For more information see the descriptions of the individual hook procedures
  /// </returns>
  /// <remarks>
  /// ?url=/library/enus/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookfunctions/setwindowshookexasp
  /// </remarks>[Page]
  [DllImport(\userdll\ CharSet = CharSetAuto
    CallingConvention = CallingConventionStdCall)]
  private static extern int CallNextHookEx(
   int idHook
   int nCode
   int wParam
   IntPtr lParam);

　　/// <summary>
  /// The CallWndProc hook procedure is an applicationdefined or librarydefined callback
  /// function used with the SetWindowsHookEx function The HOOKPROC type defines a pointer
  /// to this callback function CallWndProc is a placeholder for the applicationdefined
  /// or librarydefined function name
  /// </summary>
  /// <param name=\nCode\>
  /// [in] Specifies whether the hook procedure must process the message
  /// If nCode is HC_ACTION the hook procedure must process the message
  /// If nCode is less than zero the hook procedure must pass the message to the
  /// CallNextHookEx function without further processing and must return the
  /// value returned by CallNextHookEx
  /// </param>
  /// <param name=\wParam\>
  /// [in] Specifies whether the message was sent by the current thread
  /// If the message was sent by the current thread it is nonzero; otherwise it is zero

　　/// </param>
  /// <param name=\lParam\>
  /// [in] Pointer to a CWPSTRUCT structure that contains details about the message
  /// </param>
  /// <returns>
  /// If nCode is less than zero the hook procedure must return the value returned by CallNextHookEx
  /// If nCode is greater than or equal to zero it is highly recommended that you call CallNextHookEx
  /// and return the value it returns; otherwise other applications that have installed WH_CALLWNDPROC
  /// hooks will not receive hook notifications and may behave incorrectly as a result If the hook
  /// procedure does not call CallNextHookEx the return value should be zero
  /// </returns>
  /// <remarks>
  /// ?url=/library/enus/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookfunctions/callwndprocasp
  /// </remarks>
  private delegate int HookProc(int nCode int wParam IntPtr lParam);[Page]

　　/// <summary>
  /// The ToAscii function translates the specified virtualkey code and keyboard
  /// state to the corresponding character or characters The function translates the code
  /// using the input language and physical keyboard layout identified by the keyboard layout handle
  /// </summary>
  /// <param name=\uVirtKey\>
  /// [in] Specifies the virtualkey code to be translated
  /// </param>
  /// <param name=\uScanCode\>
  /// [in] Specifies the hardware scan code of the key to be translated
  /// The highorder bit of this value is set if the key is up (not pressed)
  /// </param>
  /// <param name=\lpbKeyState\>
  /// [in] Pointer to a byte array that contains the current keyboard state
  /// Each element (byte) in the array contains the state of one key
  /// If the highorder bit of a byte is set the key is down (pressed)
  /// The low bit if set indicates that the key is toggled on In this function
  /// only the toggle bit of the CAPS LOCK key is relevant The toggle state
  /// of the NUM LOCK and SCROLL LOCK keys is ignored
  /// </param>
  /// <param name=\lpwTransKey\>
  /// [out] Pointer to the buffer that receives the translated character or characters
  /// </param>
  /// <param name=\fuState\>
  /// [in] Specifies whether a menu is active This parameter must be if a menu is active or otherwise
  /// </param>
  /// <returns>
  /// If the specified key is a dead key the return value is negative Otherwise it is one of the following values
  /// Value Meaning
  /// The specified virtual key has no translation for the current state of the keyboard
  /// One character was copied to the buffer
  /// Two characters were copied to the buffer This usually happens when a deadkey character
  /// (accent or diacritic) stored in the keyboard layout cannot be composed with the specified
  /// virtual key to form a single character
  /// </returns>
  /// <remarks>
  /// ?url=/library/enus/winui/winui/windowsuserinterface/userinput/keyboardinput/keyboardinputreference/keyboardinputfunctions/toasciiasp[Page]
  /// </remarks>
  [DllImport(\user\)]
  private static extern int ToAscii(
   int uVirtKey
   int uScanCode
   byte[] lpbKeyState
   byte[] lpwTransKey
   int fuState);

　　/// <summary>
  /// The GetKeyboardState function copies the status of the virtual keys to the
  /// specified buffer
  /// </summary>
  /// <param name=\pbKeyState\>
  /// [in] Pointer to a byte array that contains keyboard key states
  /// </param>
  /// <returns>
  /// If the function succeeds the return value is nonzero
  /// If the function fails the return value is zero To get extended error information call GetLastError
  /// </returns>
  /// <remarks>
  /// ?url=/library/enus/winui/winui/windowsuserinterface/userinput/keyboardinput/keyboardinputreference/keyboardinputfunctions/toasciiasp

　　/// </remarks>
  [DllImport(\user\)]
  private static extern int GetKeyboardState(byte[] pbKeyState);

　　[DllImport(\userdll\ CharSet = CharSetAuto CallingConvention = CallingConventionStdCall)]
  private static extern short GetKeyState(int vKey);

　　#endregion

　　#region Windows constants

　　//values from Winuserh in Microsoft SDK
  /// <summary>
  /// Windows NT//XP: Installs a hook procedure that monitors lowlevel mouse input events
  /// </summary>
  private const int WH_MOUSE_LL = ;
  /// <summary>
  /// Windows NT//XP: Installs a hook procedure that monitors lowlevel keyboard  input events
  /// </summary>
  private const int WH_KEYBOARD_LL = ;

　　/// <summary>
  /// Installs a hook procedure that monitors mouse messages For more information see the MouseProc hook procedure
  /// </summary>
  private const int WH_MOUSE = ;
  /// <summary>
  /// Installs a hook procedure that monitors keystroke messages For more information see the KeyboardProc hook procedure
  /// </summary>
  private const int WH_KEYBOARD = ;

　　/// <summary>
  /// The WM_MOUSEMOVE message is posted to a window when the cursor moves [Page]
  /// </summary>
  private const int WM_MOUSEMOVE = x;
  /// <summary>
  /// The WM_LBUTTONDOWN message is posted when the user presses the left mouse button
  /// </summary>
  private const int WM_LBUTTONDOWN = x;
  /// <summary>
  /// The WM_RBUTTONDOWN message is posted when the user presses the right mouse button
  /// </summary>
  private const int WM_RBUTTONDOWN = x;
  /// <summary>
  /// The WM_MBUTTONDOWN message is posted when the user presses the middle mouse button
  /// </summary>
  private const int WM_MBUTTONDOWN = x;
  /// <summary>
  /// The WM_LBUTTONUP message is posted when the user releases the left mouse button
  /// </summary>
  private const int WM_LBUTTONUP = x;
  /// <summary>
  /// The WM_RBUTTONUP message is posted when the user releases the right mouse button
  /// </summary>
  private const int WM_RBUTTONUP = x;
  /// <summary>
  /// The WM_MBUTTONUP message is posted when the user releases the middle mouse button
  /// </summary>
  private const int WM_MBUTTONUP = x;
  /// <summary>
  /// The WM_LBUTTONDBLCLK message is posted when the user doubleclicks the left mouse button
  /// </summary>
  private const int WM_LBUTTONDBLCLK = x;
  /// <summary>
  /// The WM_RBUTTONDBLCLK message is posted when the user doubleclicks the right mouse button
  /// </summary>
  private const int WM_RBUTTONDBLCLK = x;
  /// <summary>
  /// The WM_RBUTTONDOWN message is posted when the user presses the right mouse button
  /// </summary>
  private const int WM_MBUTTONDBLCLK = x;
  /// <summary>
  /// The WM_MOUSEWHEEL message is posted when the user presses the mouse wheel
  /// </summary>
  private const int WM_MOUSEWHEEL = xA;

　　/// <summary>
  /// The WM_KEYDOWN message is posted to the window with the keyboard focus when a nonsystem
  /// key is pressed A nonsystem key is a key that is pressed when the ALT key is not pressed
  /// </summary>[Page]
  private const int WM_KEYDOWN = x;
  /// <summary>
  /// The WM_KEYUP message is posted to the window with the keyboard focus when a nonsystem
  /// key is released A nonsystem key is a key that is pressed when the ALT key is not pressed
  /// or a keyboard key that is pressed when a window has the keyboard focus
  /// </summary>
  private const int WM_KEYUP = x;
  /// <summary>
  /// The WM_SYSKEYDOWN message is posted to the window with the keyboard focus when the user
  /// presses the F key (which activates the menu bar) or holds down the ALT key and then
  /// presses another key It also occurs when no window currently has the keyboard focus;

　　/// in this case the WM_SYSKEYDOWN message is sent to the active window The window that
  /// receives the message can distinguish between these two contexts by checking the context
  /// code in the lParam parameter
  /// </summary>
  private const int WM_SYSKEYDOWN = x;
  /// <summary>
  /// The WM_SYSKEYUP message is posted to the window with the keyboard focus when the user
  /// releases a key that was pressed while the ALT key was held down It also occurs when no
  /// window currently has the keyboard focus; in this case the WM_SYSKEYUP message is sent
  /// to the active window The window that receives the message can distinguish between
  /// these two contexts by checking the context code in the lParam parameter
  /// </summary>
  private const int WM_SYSKEYUP = x;

　　private const byte VK_SHIFT = x;
  private const byte VK_CAPITAL = x;
  private const byte VK_NUMLOCK = x;

　　#endregion

　　/// <summary>
  /// Creates an instance of UserActivityHook object and sets mouse and keyboard hooks
  /// </summary>
  /// <exception cref=\WinException\>Any windows problem</exception>
  public UserActivityHook()
  {
   Start();
  }

　　/// <summary>
  /// Creates an instance of UserActivityHook object and installs both or one of mouse and/or keyboard hooks and starts rasing events
  /// </summary>
  /// <param name=\InstallMouseHook\><b>true</b> if mouse events must be monitored</param>[Page]
  /// <param name=\InstallKeyboardHook\><b>true</b> if keyboard events must be monitored</param>
  /// <exception cref=\WinException\>Any windows problem</exception>
  /// <remarks>
  /// To create an instance without installing hooks call new UserActivityHook(false false)
  /// </remarks>
  public UserActivityHook(bool InstallMouseHook bool InstallKeyboardHook)
  {
   Start(InstallMouseHook InstallKeyboardHook);
  }

　　/// <summary>
  /// Destruction
  /// </summary>
  ~UserActivityHook()
  {
   //uninstall hooks and do not throw exceptions
   Stop(true true false);
  }

　　/// <summary>
  /// Occurs when the user moves the mouse presses any mouse button or scrolls the wheel
  /// </summary>
  public event MouseEventHandler OnMouseActivity;
  /// <summary>
  /// Occurs when the user presses a key
  /// </summary>
  public event KeyEventHandler KeyDown;
  /// <summary>
  /// Occurs when the user presses and releases
  /// </summary>
  public event KeyPressEventHandler KeyPress;
  /// <summary>
  /// Occurs when the user releases a key
  /// </summary>
  public event KeyEventHandler KeyUp;

　　/// <summary>
  /// Stores the handle to the mouse hook procedure
  /// </summary>
  private int hMouseHook = ;
  /// <summary>
  /// Stores the handle to the keyboard hook procedure
  /// </summary>
  private int hKeyboardHook = ;

　　/// <summary>
  /// Declare MouseHookProcedure as HookProc type
  /// </summary>
  private static HookProc MouseHookProcedure;
  /// <summary>
  /// Declare KeyboardHookProcedure as HookProc type
  /// </summary>
  private static HookProc KeyboardHookProcedure;

　　/// <summary>
  /// Installs both mouse and keyboard hooks and starts raising events
  /// </summary>
  /// <exception cref=\WinException\>Any windows problem</exception>
  public void Start()[Page]
  {
   thisStart(true true);
  }

　　/// <summary>
  /// Installs both or one of mouse and/or keyboard hooks and starts raising events
  /// </summary>
  /// <param name=\InstallMouseHook\><b>true</b> if mouse events must be monitored</param>
  /// <param name=\InstallKeyboardHook\><b>true</b> if keyboard events must be monitored</param>

　　/// <exception cref=\WinException\>Any windows problem</exception>
  public void Start(bool InstallMouseHook bool InstallKeyboardHook)
  {
   // install Mouse hook only if it is not installed and must be installed
   if (hMouseHook == && InstallMouseHook)
   {
    // Create an instance of HookProc
    MouseHookProcedure = new HookProc(MouseHookProc);
    //install hook
    hMouseHook = SetWindowsHookEx(
     WH_MOUSE_LL
     MouseHookProcedure
     MarshalGetHINSTANCE(
     AssemblyGetExecutingAssembly()GetModules()[])
     );
    //If SetWindowsHookEx fails
    if (hMouseHook == )
    {
     //Returns the error code returned by the last unmanaged function called using platform invoke that has the DllImportAttributeSetLastError flag set
     int errorCode = MarshalGetLastWinError();
     //do cleanup
     Stop(true false false);
     //Initializes and throws a new instance of the WinException class with the specified error
     throw new WinException(errorCode);
    }
   }

　　// install Keyboard hook only if it is not installed and must be installed
   if (hKeyboardHook == && InstallKeyboardHook)
   {
    // Create an instance of HookProc
    KeyboardHookProcedure = new HookProc(KeyboardHookProc);
    //install hook
    hKeyboardHook = SetWindowsHookEx(
     WH_KEYBOARD_LL
     KeyboardHookProcedure[Page]
     MarshalGetHINSTANCE(
     AssemblyGetExecutingAssembly()GetModules()[])
     );

    //If SetWindowsHookEx fails
    if (hKeyboardHook == )
    {
     //Returns the error code returned by the last unmanaged function called using platform invoke that has the DllImportAttributeSetLastError flag set
     int errorCode = MarshalGetLastWinError();
     //do cleanup
     Stop(false true false);
     //Initializes and throws a new instance of the WinException class with the specified error
     throw new WinException(errorCode);
    }
   }
  }

　　/// <summary>
  /// Stops monitoring both mouse and keyboard events and rasing events
  /// </summary>
  /// <exception cref=\WinException\>Any windows problem</exception>
  public void Stop()
  {
   thisStop(true true true);
  }

　　/// <summary>
  /// Stops monitoring both or one of mouse and/or keyboard events and rasing events
  /// </summary>
  /// <param name=\UninstallMouseHook\><b>true</b> if mouse hook must be uninstalled</param>
  /// <param name=\UninstallKeyboardHook\><b>true</b> if keyboard hook must be uninstalled</param>
  /// <param name=\ThrowExceptions\><b>true</b> if exceptions which occured during uninstalling must be thrown</param>
  /// <exception cref=\WinException\>Any windows problem</exception>
  public void Stop(bool UninstallMouseHook bool UninstallKeyboardHook bool ThrowExceptions)
  {
   //if mouse hook set and must be uninstalled
   if (hMouseHook != && UninstallMouseHook)
   {
    //uninstall hook
    int retMouse = UnhookWindowsHookEx(hMouseHook);
    //reset invalid handle
    hMouseHook = ;
    //if failed and exception must be thrown
    if (retMouse == && ThrowExceptions)
    {[Page]
     //Returns the error code returned by the last unmanaged function called using platform invoke that has the DllImportAttributeSetLastError flag set
     int errorCode = MarshalGetLastWinError();

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

　　//if keyboard hook set and must be uninstalled
   if (hKeyboardHook != && UninstallKeyboardHook)
   {
    //uninstall hook
    int retKeyboard = UnhookWindowsHookEx(hKeyboardHook);
    //reset invalid handle
    hKeyboardHook = ;
    //if failed and exception must be thrown
    if (retKeyboard == && ThrowExceptions)
    {
     //Returns the error code returned by the last unmanaged function called using platform invoke that has the DllImportAttributeSetLastError flag set
     int errorCode = MarshalGetLastWinError();
     //Initializes and throws a new instance of the WinException class with the specified error
     throw new WinException(errorCode);
    }
   }
  }

　　/// <summary>
  /// A callback function which will be called every time a mouse activity detected
  /// </summary>
  /// <param name=\nCode\>
  /// [in] Specifies whether the hook procedure must process the message
  /// If nCode is HC_ACTION the hook procedure must process the message
  /// If nCode is less than zero the hook procedure must pass the message to the
  /// CallNextHookEx function without further processing and must return the
  /// value returned by CallNextHookEx
  /// </param>
  /// <param name=\wParam\>
  /// [in] Specifies whether the message was sent by the current thread
  /// If the message was sent by the current thread it is nonzero; otherwise it is zero
  /// </param>
  /// <param name=\lParam\>
  /// [in] Pointer to a CWPSTRUCT structure that contains details about the message [Page]
  /// </param>
  /// <returns>
  /// If nCode is less than zero the hook procedure must return the value returned by CallNextHookEx
  /// If nCode is greater than or equal to zero it is highly recommended that you call CallNextHookEx
  /// and return the value it returns; otherwise other applications that have installed WH_CALLWNDPROC
  /// hooks will not receive hook notifications and may behave incorrectly as a result If the hook
  /// procedure does not call CallNextHookEx the return value should be zero
  /// </returns>
  private int MouseHookProc(int nCode int wParam IntPtr lParam)
  {
   // if ok and someone listens to our events
   if ((nCode >= ) && (OnMouseActivity != null))
   {
    //Marshall the data from callback
    MouseLLHookStruct mouseHookStruct = (MouseLLHookStruct)MarshalPtrToStructure(lParam typeof(MouseLLHookStruct));

　　//detect button clicked
    MouseButtons button = MouseButtonsNone;
    short mouseDelta = ;
    switch (wParam)
    {
     case WM_LBUTTONDOWN:
      //case WM_LBUTTONUP:
      //case WM_LBUTTONDBLCLK:
      button = MouseButtonsLeft;
      break;
     case WM_RBUTTONDOWN:
      //case WM_RBUTTONUP:
      //case WM_RBUTTONDBLCLK:
      button = MouseButtonsRight;
      break;
     case WM_MOUSEWHEEL:
      //If the message is WM_MOUSEWHEEL the highorder word of mouseData member is the wheel delta
      //One wheel click is defined as WHEEL_DELTA which is
      //(value >> ) & xffff; retrieves the highorder word from the given bit value
      mouseDelta = (short)((mouseHookStructmouseData >> ) & xffff);
      //TODO: X BUTTONS (I havent them so was unable to test)
      //If the message is WM_XBUTTONDOWN WM_XBUTTONUP WM_XBUTTONDBLCLK WM_NCXBUTTONDOWN WM_NCXBUTTONUP

　　//or WM_NCXBUTTONDBLCLK the highorder word specifies which X button was pressed or released
      //and the loworder word is reserved This value can be one or more of the following values
      //Otherwise mouseData is not used
      break;
    }

　　//double clicks
    int clickCount = ;
    if (button != MouseButtonsNone)
     if (wParam == WM_LBUTTONDBLCLK || wParam == WM_RBUTTONDBLCLK) clickCount = ;
     else clickCount = ;

　　//generate event
    MouseEventArgs e = new MouseEventArgs(
     button
     clickCount
     mouseHookStructptx
     mouseHookStructpty
     mouseDelta);
    //raise it
    OnMouseActivity(this e);
   }
   //call next hook
   return CallNextHookEx(hMouseHook nCode wParam lParam);
  }

　　/// <summary>
  /// A callback function which will be called every time a keyboard activity detected
  /// </summary>
  /// <param name=\nCode\>
  /// [in] Specifies whether the hook procedure must process the message
  /// If nCode is HC_ACTION the hook procedure must process the message
  /// If nCode is less than zero the hook procedure must pass the message to the
  /// CallNextHookEx function without further processing and must return the
  /// value returned by CallNextHookEx
  /// </param>
  /// <param name=\wParam\>
  /// [in] Specifies whether the message was sent by the current thread
  /// If the message was sent by the current thread it is nonzero; otherwise it is zero
  /// </param>
  /// <param name=\lParam\>
  /// [in] Pointer to a CWPSTRUCT structure that contains details about the message
  /// </param>
  /// <returns>
  /// If nCode is less than zero the hook procedure must return the value returned by CallNextHookEx
  /// If nCode is greater than or equal to zero it is highly recommended that you call CallNextHookEx [Page]
  /// and return the value it returns; otherwise other applications that have installed WH_CALLWNDPROC
  /// hooks will not receive hook notifications and may behave incorrectly as a result If the hook
  /// procedure does not call CallNextHookEx the return value should be zero
  /// </returns>
  private int KeyboardHookProc(int nCode Int wParam IntPtr lParam)
  {
   //indicates if any of underlaing events set eHandled flag
   bool handled = false;
   //it was ok and someone listens to events
   if ((nCode >= ) && (KeyDown != null || KeyUp != null || KeyPress != null))
   {
    //read structure KeyboardHookStruct at lParam
    KeyboardHookStruct MyKeyboardHookStruct = (KeyboardHookStruct)MarshalPtrToStructure(lParam typeof(KeyboardHookStruct));
    //raise KeyDown
    if (KeyDown != null && (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN))
    {
     Keys keyData = (Keys)MyKeyboardHookStructvkCode;
     KeyEventArgs e = new KeyEventArgs(keyData);
     KeyDown(this e);
     handled = handled || eHandled;
    }

　　// raise KeyPress
    if (KeyPress != null && wParam == WM_KEYDOWN)
    {
     bool isDownShift = ((GetKeyState(VK_SHIFT) & x) == x ? true : false);
     bool isDownCapslock = (GetKeyState(VK_CAPITAL) != ? true : false);

　　byte[] keyState = new byte[];
     GetKeyboardState(keyState);
     byte[] inBuffer = new byte[];
     if (ToAscii(MyKeyboardHookStructvkCode
      MyKeyboardHookStructscanCode
      keyState
      inBuffer
      MyKeyboardHookStructflags) == )

　　{
      char key = (char)inBuffer[];
      if ((isDownCapslock ^ isDownShift) && CharIsLetter(key)) key = CharToUpper(key);
      KeyPressEventArgs e = new KeyPressEventArgs(key);[Page]
      KeyPress(this e);
      handled = handled || eHandled;
     }
    }

　　// raise KeyUp
    if (KeyUp != null && (wParam == WM_KEYUP || wParam == WM_SYSKEYUP))
    {
     Keys keyData = (Keys)MyKeyboardHookStructvkCode;
     KeyEventArgs e = new KeyEventArgs(keyData);
     KeyUp(this e);
     handled = handled || eHandled;
    }

　　}

　　//if event handled in application do not handoff to other listeners
   if (handled)
    return ;
   else
    return CallNextHookEx(hKeyboardHook nCode wParam lParam);
  }
 }
}

　　Formcs

　　
using System;
using SystemDrawing;
using SystemCollections;
using SystemComponentModel;
using SystemWindowsForms;
using SystemData;

　　namespace WindowsApplication
{
 /// <summary>
 /// Form 的摘要說明清清月兒主頁;  
/// </summary>
 public class Form : SystemWindowsFormsForm
 {
  private SystemWindowsFormsTextBox textBox;
  private SystemWindowsFormsTextBox textBox;
  private SystemWindowsFormsPanel panel;
  /// <summary>
  /// 必需的設計器變量
  /// </summary>
  private SystemComponentModelContainer components = null;

　　public Form()
  {
   //
   // Windows 窗體設計器支持所必需的
   //
   InitializeComponent();

　　//
   // TODO: 在 InitializeComponent 調用後添加任何構造函數代碼
   //
  }

　　/// <summary>
  /// 清理所有正在使用的資源
  /// </summary>
  protected override void Dispose( bool disposing )
  {
   if( disposing )
   {
    if (components != null)
    {
     componentsDispose();
    }
   }
   baseDispose( disposing );
  }

　　#region Windows 窗體設計器生成的代碼
  /// <summary>
  /// 設計器支持所需的方法 不要使用代碼編輯器修改[Page]
  /// 此方法的內容
  /// </summary>
  private void InitializeComponent()
  {
   thistextBox = new SystemWindowsFormsTextBox();
   thistextBox = new SystemWindowsFormsTextBox();
   thispanel = new SystemWindowsFormsPanel();
   thispanelSuspendLayout();
   thisSuspendLayout();
   //
   // textBox

   //
   thistextBoxLocation = new SystemDrawingPoint( );
   thistextBoxName = \textBox\;
   thistextBoxSize = new SystemDrawingSize( );
   thistextBoxTabIndex = ;
   thistextBoxText = \\;
   //
   // textBox
   //
   thistextBoxLocation = new SystemDrawingPoint( );
   thistextBoxMultiline = true;
   thistextBoxName = \textBox\;
   thistextBoxSize = new SystemDrawingSize( );
   thistextBoxTabIndex = ;
   thistextBoxText = \textBox\;
   //
   // panel
   //
   thispanelControlsAdd(thistextBox);
   thispanelLocation = new SystemDrawingPoint( );
   thispanelName = \panel\;
   thispanelSize = new SystemDrawingSize( );
   thispanelTabIndex = ;
   //
   // Form
   //
   thisAutoScaleBaseSize = new SystemDrawingSize( );
   thisClientSize = new SystemDrawingSize( );

　　thisControlsAdd(thispanel);
   thisControlsAdd(thistextBox);
   thisName = \Form\;
   thisText = \Form\;
   thisLoad += new SystemEventHandler(thisForm_Load);
   thispanelResumeLayout(false);
   thisResumeLayout(false);

　　}
  #endregion

　　/// <summary>
  /// 應用程序的主入口點
  /// </summary>
  [STAThread]
  static void Main()
  {
   ApplicationRun(new Form());

　　}

　　public void MyKeyDown(object sender KeyEventArgs e)
  {
  }

　　public void MyKeyPress(object sender KeyPressEventArgs e)[Page]
  {
  }

　　public void MyKeyUp(object sender KeyEventArgs e)
  {
  }
  

　　void choose_OnMouseActivity(object sender MouseEventArgs e)
  {
                                          //自定義右鍵
   //if (ActiveControlParent == panel) 備用
   //if (ActiveControlParent is SystemWindowsFormsPanel) 備用
  if (ActiveControl == textBox)
   {
    MenuItem copy = new MenuItem(\copy\);
    copyClick += new EventHandler(copy_Click);           
    MenuItem[] menuItems = new MenuItem[] { copy };

　　ContextMenu buttonMenu = new ContextMenu(menuItems);          
    textBoxContextMenu = buttonMenu;
    //thisActiveControlContextMenu = buttonMenu; 備用
   }
  }

　　private void copy_Click(object sender EventArgs e)
  {
   
ClipboardSetDataObject(textBoxSelectedText) ; //復制到剪切板
   
  }

　　private void Form_Load(object sender SystemEventArgs e)
  {
                                          //初始化
gmaSystemWindowsUserActivityHook  choosesc=new gmaSystemWindowsUserActivityHook();
   choosescOnMouseActivity += new MouseEventHandler(choose_OnMouseActivity);
//   choosescKeyDown += new KeyEventHandler(MyKeyDown);
//   choosescKeyPress += new KeyPressEventHandler(MyKeyPress);
//   choosescKeyUp += new KeyEventHandler(MyKeyUp);

　　}

　　}
}

　　說明這個鉤子有點問題就是一次只能打開一個窗口（如果該窗口使用鉤子）打開後一定要關閉否則出問題後果很嚴重！！！ 

From:http://tw.wingwit.com/Article/program/net/201311/13113.html