无法获取全局键盘和鼠标钩子事件

Question

我正在使用全局键盘和鼠标钩来处理键盘和鼠标活动.我遇到的问题就像用户使用团队查看器或远程桌面(连接到远程计算机),然后我们无法获得键盘和鼠标挂钩(挂钩在本地计算机上).我们有一个后台计时器运行,它继续检查何时是最后输入时间然后如果它大于1分钟我将卸载挂钩并安装它.当我们这样做时,我每次卸载并安装钩子时都会获得唯一指针(ptrHook),但我无法收听事件.一旦挂钩丢失,即使在卸载和安装挂钩后无法获取事件.

对于鼠标钩

public void InstallHook(int processId)
{
  try
   {
     ProcessModule objCurrentModule = null;
     objCurrentModule = Process.GetProcessById(processId).MainModule;
     objMouseProcess = new LowLevelMouseProc(captureMouse);
     //In order to avoid memory access violation error allocate the memory from GCHandle
                //Refer :http://social.msdn.microsoft.com/Forums/en/csharpgeneral/thread/b0defb8f-1242-4485-a680-8773da07db2f
     GCHandle.Alloc(objMouseProcess);
     ptrHook = SetWindowsHookEx(WH_MOUSE_LL, objMouseProcess, GetModuleHandle(objCurrentModule.ModuleName), 0);
  }
}

对于键盘钩

public void InstallHook(int processId)
{
    try
    {
        ProcessModule objCurrentModule = null;
        objCurrentModule = Process.GetProcessById(processId).MainModule;
        objKeyboardProcess = new LowLevelKeyboardProc(captureKey);
        //In order to avoid memory access violation error allocate the memory from GCHandle
        //Refer :http://social.msdn.microsoft.com/Forums/en/csharpgeneral/thread/b0defb8f-1242-4485-a680-8773da07db2f
        GCHandle.Alloc(objKeyboardProcess);
        ptrHook = SetWindowsHookEx(WH_KEYBOARD_LL, objKeyboardProcess, GetModuleHandle(objCurrentModule.ModuleName), 0);
    }
}