C 利用鉤子控制滑鼠【月兒原創】
C#利用鉤子控制滑鼠
作者：清清月兒
主頁：http://blog.csdn.net/21aspnet/ 時間：2007.5.11
工作中有這樣的需求，某個控制元件panel的子控制元件textbox要實現只留滑鼠右鍵copy,注意同時還不能影響其它panel的子控制元件textbox,怎麼辦？
答案是隻有用鉤子,在codeporject上找到這麼一個鉤子。
如圖所示，第一個文字框只有copy功能。
UserActivityHook.cs
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 
/// </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">
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