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。
UserActivityHook.cs
using System;using System.Runtime.InteropServices;using System.Reflection;using System.Threading;using System.Windows.Forms;using System.ComponentModel;namespace gma.System.Windows
...{
/**//// <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 ...{ Windows structure definitions#region Windows structure definitions /**//// <summary> /// The POINT structure defines the x- and y- coordinates of a point. /// </summary> /// <remarks> /// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/rectangl_0tiq.asp /// </remarks> [StructLayout(LayoutKind.Sequential)] private class POINT ...{ /**//// <summary> /// Specifies the x-coordinate of the point. /// </summary> public int x; /**//// <summary> /// Specifies the y-coordinate 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> /// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookstructures/cwpstruct.asp /// </remarks> [StructLayout(LayoutKind.Sequential)] private class MouseHookStruct ...{ /**//// <summary> /// Specifies a POINT structure that contains the x- and y-coordinates 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. /// </summary> public int hwnd; /**//// <summary> /// Specifies the hit-test value. For a list of hit-test 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 low-level keyboard input event. /// </summary> [StructLayout(LayoutKind.Sequential)] private class MouseLLHookStruct ...{ /**//// <summary> /// Specifies a POINT structure that contains the x- and y-coordinates of the cursor, in screen coordinates. /// </summary> public POINT pt; /**//// <summary> /// If the message is WM_MOUSEWHEEL, the high-order word of this member is the wheel delta. /// The low-order 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 120. ///If the message is WM_XBUTTONDOWN, WM_XBUTTONUP, WM_XBUTTONDBLCLK, WM_NCXBUTTONDOWN, WM_NCXBUTTONUP, /// or WM_NCXBUTTONDBLCLK, the high-order word specifies which X button was pressed or released, /// and the low-order word is reserved. This value can be one or more of the following values. Otherwise, mouseData is not used. ///XBUTTON1 ///The first X button was pressed or released. ///XBUTTON2 ///The second X button was pressed or released. /// </summary> public int mouseData; /**//// <summary> /// Specifies the event-injected flag. An application can use the following value to test the mouse flags. Value Purpose ///LLMHF_INJECTED Test the event-injected flag. ///0 ///Specifies whether the event was injected. The value is 1 if the event was injected; otherwise, it is 0. ///1-15 ///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 low-level keyboard input event. /// </summary> /// <remarks> /// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookstructures/cwpstruct.asp /// </remarks> [StructLayout(LayoutKind.Sequential)] private class KeyboardHookStruct ...{ /**//// <summary> /// Specifies a virtual-key code. The code must be a value in the range 1 to 254. /// </summary> public int vkCode; /**//// <summary> /// Specifies a hardware scan code for the key. /// </summary> public int scanCode; /**//// <summary> /// Specifies the extended-key flag, event-injected flag, context code, and transition-state 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 Windows function imports#region Windows function imports /**//// <summary> /// The SetWindowsHookEx function installs an application-defined 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> /// <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 dynamic-link /// 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> /// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookfunctions/setwindowshookex.asp /// </remarks> [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall, 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. /// </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> /// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookfunctions/setwindowshookex.asp /// </remarks> [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall, 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> /// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookfunctions/setwindowshookex.asp /// </remarks> [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] private static extern int CallNextHookEx( int idHook, int nCode, int wParam, IntPtr lParam); /**//// <summary> /// The CallWndProc hook procedure is an application-defined or library-defined callback /// function used with the SetWindowsHookEx function. The HOOKPROC type defines a pointer /// to this callback function. CallWndProc is a placeholder for the application-defined /// or library-defined 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> /// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookfunctions/callwndproc.asp /// </remarks> private delegate int HookProc(int nCode, int wParam, IntPtr lParam); /**//// <summary> /// The ToAscii function translates the specified virtual-key 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 virtual-key code to be translated. /// </param> /// <param name="uScanCode"> /// [in] Specifies the hardware scan code of the key to be translated. /// The high-order bit of this value is set if the key is up (not pressed). /// </param> /// <param name="lpbKeyState"> /// [in] Pointer to a 256-byte array that contains the current keyboard state. /// Each element (byte) in the array contains the state of one key. /// If the high-order 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 1 if a menu is active, or 0 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 /// 0 The specified virtual key has no translation for the current state of the keyboard. /// 1 One character was copied to the buffer. /// 2 Two characters were copied to the buffer. This usually happens when a dead-key character /// (accent or diacritic) stored in the keyboard layout cannot be composed with the specified /// virtual key to form a single character. /// </returns> /// <remarks> /// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/userinput/keyboardinput/keyboardinputreference/keyboardinputfunctions/toascii.asp /// </remarks> [DllImport("user32")] private static extern int ToAscii( int uVirtKey, int uScanCode, byte[] lpbKeyState, byte[] lpwTransKey, int fuState); /**//// <summary> /// The GetKeyboardState function copies the status of the 256 virtual keys to the /// specified buffer. /// </summary> /// <param name="pbKeyState"> /// [in] Pointer to a 256-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> /// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/userinput/keyboardinput/keyboardinputreference/keyboardinputfunctions/toascii.asp /// </remarks> [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 Windows constants#region Windows constants //values from Winuser.h in Microsoft SDK. /**//// <summary> /// Windows NT/2000/XP: Installs a hook procedure that monitors low-level mouse input events. /// </summary> private const int WH_MOUSE_LL = 14; /**//// <summary> /// Windows NT/2000/XP: Installs a hook procedure that monitors low-level keyboard input events. /// </summary> private const int WH_KEYBOARD_LL = 13; /**//// <summary> /// Installs a hook procedure that monitors mouse messages. For more information, see the MouseProc hook procedure. /// </summary> private const int WH_MOUSE = 7; /**//// <summary> /// Installs a hook procedure that monitors keystroke messages. For more information, see the KeyboardProc hook procedure. /// </summary> private const int WH_KEYBOARD = 2; /**//// <summary> /// The WM_MOUSEMOVE message is posted to a window when the cursor moves. /// </summary> private const int WM_MOUSEMOVE = 0x200; /**//// <summary> /// The WM_LBUTTONDOWN message is posted when the user presses the left mouse button /// </summary> private const int WM_LBUTTONDOWN = 0x201; /**//// <summary> /// The WM_RBUTTONDOWN message is posted when the user presses the right mouse button /// </summary> private const int WM_RBUTTONDOWN = 0x204; /**//// <summary> /// The WM_MBUTTONDOWN message is posted when the user presses the middle mouse button /// </summary> private const int WM_MBUTTONDOWN = 0x207; /**//// <summary> /// The WM_LBUTTONUP message is posted when the user releases the left mouse button /// </summary> private const int WM_LBUTTONUP = 0x202; /**//// <summary> /// The WM_RBUTTONUP message is posted when the user releases the right mouse button /// </summary> private const int WM_RBUTTONUP = 0x205; /**//// <summary> /// The WM_MBUTTONUP message is posted when the user releases the middle mouse button /// </summary> private const int WM_MBUTTONUP = 0x208; /**//// <summary> /// The WM_LBUTTONDBLCLK message is posted when the user double-clicks the left mouse button /// </summary> private const int WM_LBUTTONDBLCLK = 0x203; /**//// <summary> /// The WM_RBUTTONDBLCLK message is posted when the user double-clicks the right mouse button /// </summary> private const int WM_RBUTTONDBLCLK = 0x206; /**//// <summary> /// The WM_RBUTTONDOWN message is posted when the user presses the right mouse button /// </summary> private const int WM_MBUTTONDBLCLK = 0x209; /**//// <summary> /// The WM_MOUSEWHEEL message is posted when the user presses the mouse wheel. /// </summary> private const int WM_MOUSEWHEEL = 0x020A; /**//// <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> private const int WM_KEYDOWN = 0x100; /**//// <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 = 0x101; /**//// <summary> /// The WM_SYSKEYDOWN message is posted to the window with the keyboard focus when the user /// presses the F10 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 = 0x104; /**//// <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 = 0x105; private const byte VK_SHIFT = 0x10; private const byte VK_CAPITAL = 0x14; private const byte VK_NUMLOCK = 0x90; #endregion /**//// <summary> /// Creates an instance of UserActivityHook object and sets mouse and keyboard hooks. /// </summary> /// <exception cref="Win32Exception">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> /// <param name="InstallKeyboardHook"><b>true</b> if keyboard events must be monitored</param> /// <exception cref="Win32Exception">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 = 0; /**//// <summary> /// Stores the handle to the keyboard hook procedure. /// </summary> private int hKeyboardHook = 0; /**//// <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="Win32Exception">Any windows problem.</exception> public void Start() ...{ this.Start(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="Win32Exception">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 == 0 && InstallMouseHook) ...{ // Create an instance of HookProc. MouseHookProcedure = new HookProc(MouseHookProc); //install hook hMouseHook = SetWindowsHookEx( WH_MOUSE_LL, MouseHookProcedure, Marshal.GetHINSTANCE( Assembly.GetExecutingAssembly().GetModules()[0]), 0); //If SetWindowsHookEx fails. if (hMouseHook == 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 Stop(true, false, false); //Initializes and throws a new instance of the Win32Exception class with the specified error. throw new Win32Exception(errorCode); } } // install Keyboard hook only if it is not installed and must be installed if (hKeyboardHook == 0 && InstallKeyboardHook) ...{ // Create an instance of HookProc. KeyboardHookProcedure = new HookProc(KeyboardHookProc); //install hook hKeyboardHook = SetWindowsHookEx( WH_KEYBOARD_LL, KeyboardHookProcedure, Marshal.GetHINSTANCE( Assembly.GetExecutingAssembly().GetModules()[0]), 0); //If SetWindowsHookEx fails. if (hKeyboardHook == 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 Stop(false, true, false); //Initializes and throws a new instance of the Win32Exception class with the specified error. throw new Win32Exception(errorCode); } } } /**//// <summary> /// Stops monitoring both mouse and keyboard events and rasing events. /// </summary> /// <exception cref="Win32Exception">Any windows problem.</exception> public void Stop() ...{ this.Stop(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="Win32Exception">Any windows problem.</exception> public void Stop(bool UninstallMouseHook, bool UninstallKeyboardHook, bool ThrowExceptions) ...{ //if mouse hook set and must be uninstalled if (hMouseHook != 0 && UninstallMouseHook) ...{ //uninstall hook int retMouse = UnhookWindowsHookEx(hMouseHook); //reset invalid handle hMouseHook = 0; //if failed and exception must be thrown if (retMouse == 0 && ThrowExceptions) ...{ //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(); //Initializes and throws a new instance of the Win32Exception class with the specified error. throw new Win32Exception(errorCode); } } //if keyboard hook set and must be uninstalled if (hKeyboardHook != 0 && UninstallKeyboardHook) ...{ //uninstall hook int retKeyboard = UnhookWindowsHookEx(hKeyboardHook); //reset invalid handle hKeyboardHook = 0; //if failed and exception must be thrown if (retKeyboard == 0 && ThrowExceptions) ...{ //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(); //Initializes and throws a new instance of the Win32Exception class with the specified error. throw new Win32Exception(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. /// </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 >= 0) && (OnMouseActivity != null)) ...{ //Marshall the data from callback. MouseLLHookStruct mouseHookStruct = (MouseLLHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseLLHookStruct)); //detect button clicked MouseButtons button = MouseButtons.None; short mouseDelta = 0; switch (wParam) ...{ case WM_LBUTTONDOWN: //case WM_LBUTTONUP: //case WM_LBUTTONDBLCLK: button = MouseButtons.Left; break; case WM_RBUTTONDOWN: //case WM_RBUTTONUP: //case WM_RBUTTONDBLCLK: button = MouseButtons.Right; break; case WM_MOUSEWHEEL: //If the message is WM_MOUSEWHEEL, the high-order word of mouseData member is the wheel delta. //One wheel click is defined as WHEEL_DELTA, which is 120. //(value >> 16) & 0xffff; retrieves the high-order word from the given 32-bit value mouseDelta = (short)((mouseHookStruct.mouseData >> 16) & 0xffff); //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 high-order word specifies which X button was pressed or released, //and the low-order word is reserved. This value can be one or more of the following values. //Otherwise, mouseData is not used. break; } //double clicks int clickCount = 0; if (button != MouseButtons.None) if (wParam == WM_LBUTTONDBLCLK || wParam == WM_RBUTTONDBLCLK) clickCount = 2; else clickCount = 1; //generate event MouseEventArgs e = new MouseEventArgs( button, clickCount, mouseHookStruct.pt.x, mouseHookStruct.pt.y, 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 /// 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, Int32 wParam, IntPtr lParam) ...{ //indicates if any of underlaing events set e.Handled flag bool handled = false; //it was ok and someone listens to events if ((nCode >= 0) && (KeyDown != null || KeyUp != null || KeyPress != null)) ...{ //read structure KeyboardHookStruct at lParam KeyboardHookStruct MyKeyboardHookStruct = (KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardHookStruct)); //raise KeyDown 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; } // raise KeyPress 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; } } // raise KeyUp 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 event handled in application do not handoff to other listeners if (handled) return 1; else return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam); } }
}
Form1.cs
using System;using System.Drawing;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Data;namespace WindowsApplication2...{ /**//// <summary> /// Form1 的摘要說明。清清月兒主頁：http://blog.csdn.net/21aspnet/ /// </summary> public class Form1 : System.Windows.Forms.Form ...{ private System.Windows.Forms.TextBox textBox1; private System.Windows.Forms.TextBox textBox2; private System.Windows.Forms.Panel panel1; /**//// <summary> /// 必需的設計器變量。 /// </summary> private System.ComponentModel.Container components = null; public Form1() ...{ // // 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) ...{ components.Dispose(); } } base.Dispose( disposing ); } Windows 窗體設計器生成的代碼#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 /// 此方法的內容。 /// </summary> private void InitializeComponent() ...{ this.textBox1 = new System.Windows.Forms.TextBox(); this.textBox2 = new System.Windows.Forms.TextBox(); this.panel1 = new System.Windows.Forms.Panel(); this.panel1.SuspendLayout(); this.SuspendLayout(); // // textBox1 // this.textBox1.Location = new System.Drawing.Point(0, 8); this.textBox1.Name = "textBox1"; this.textBox1.Size = new System.Drawing.Size(256, 20); this.textBox1.TabIndex = 1; this.textBox1.Text = "111"; // // textBox2 // this.textBox2.Location = new System.Drawing.Point(8, 48); this.textBox2.Multiline = true; this.textBox2.Name = "textBox2"; this.textBox2.Size = new System.Drawing.Size(256, 176); this.textBox2.TabIndex = 2; this.textBox2.Text = "textBox2"; // // panel1 // this.panel1.Controls.Add(this.textBox1); this.panel1.Location = new System.Drawing.Point(8, 0); this.panel1.Name = "panel1"; this.panel1.Size = new System.Drawing.Size(280, 40); this.panel1.TabIndex = 3; // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(272, 229); this.Controls.Add(this.panel1); this.Controls.Add(this.textBox2); this.Name = "Form1"; this.Text = "Form1"; this.Load += new System.EventHandler(this.Form1_Load); this.panel1.ResumeLayout(false); this.ResumeLayout(false); } #endregion /**//// <summary> /// 應用程序的主入口點。 /// </summary> [STAThread] static void Main() ...{ Application.Run(new Form1()); } public void MyKeyDown(object sender, KeyEventArgs e) ...{ } public void MyKeyPress(object sender, KeyPressEventArgs e) ...{ } public void MyKeyUp(object sender, KeyEventArgs e) ...{ } void choose_OnMouseActivity(object sender, MouseEventArgs e) ...{ //自定義右鍵 //if (ActiveControl.Parent == panel1) 備用 //if (ActiveControl.Parent is System.Windows.Forms.Panel) 備用 if (ActiveControl == textBox1) ...{ MenuItem copy = new MenuItem("copy"); copy.Click += new EventHandler(copy_Click); MenuItem[] menuItems = new MenuItem[] ...{ copy }; ContextMenu buttonMenu = new ContextMenu(menuItems); textBox1.ContextMenu = buttonMenu; //this.ActiveControl.ContextMenu = buttonMenu; 備用 } } private void copy_Click(object sender, EventArgs e) ...{ Clipboard.SetDataObject(textBox1.SelectedText) ; //復制到剪切板 } private void Form1_Load(object sender, System.EventArgs e) ...{ //初始化 gma.System.Windows.UserActivityHook choosesc=new gma.System.Windows.UserActivityHook(); choosesc.OnMouseActivity += new MouseEventHandler(choose_OnMouseActivity);// choosesc.KeyDown += new KeyEventHandler(MyKeyDown);// choosesc.KeyPress += new KeyPressEventHandler(MyKeyPress);// choosesc.KeyUp += 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！！！
