SetWindowsHookEx无法重复挂钩特定的应用程序

Question

我想使用SetWindowsHookEx（）来按下用户的键并单击鼠标。 我已经定义了一个全局键盘/鼠标钩子并使用SetWindowsHookEx安装它。 钩子适用于几乎应用，但它不能用于特定应用（例如Cain＆amp; Abel）。

问题是：

当我第一次点击Cain＆amp;阿贝尔，我可以获得点击信息。然后它才能工作，直到我点击另一个应用程序或控制台。

以下是我的代码的一部分：

    #include <QtCore/QCoreApplication>
    #include <QtDebug>
    #include <QTime>
    #include <QChar>
    #include <iostream>
    #include <Windows.h>
    #pragma comment(lib, "user32.lib")

    HHOOK hHook = NULL;
    HHOOK hMouseHook = NULL;

主：

    int main(int argc, char *argv[])
    {

        QCoreApplication a(argc, argv);
        HINSTANCE hInstance = GetModuleHandle(NULL);

        hHook = SetWindowsHookEx(WH_KEYBOARD_LL, MyLowerLevelKeyBoardProc, NULL, 0);
        hMouseHook = SetWindowsHookEx(WH_MOUSE_LL, MyLowerLevelMouseProc, hInstance, 0);

        MSG message;
        while (GetMessage(&message,NULL,0,0)) {
            TranslateMessage( &message );
            DispatchMessage( &message );
        }

        UnhookWindowsHookEx(hHook);
        UnhookWindowsHookEx(hMouseHook);


        if (hHook == NULL || hMouseHook == NULL)
        {
            qDebug() << "Hook failed";
        }

        return a.exec();
    }

回调函数：MyLowerLevelMouseProc

    LRESULT CALLBACK MyLowerLevelMouseProc(int nCode, WPARAM wParam, LPARAM lParam){
MOUSEHOOKSTRUCT *pMouseStruct = (MOUSEHOOKSTRUCT *)lParam;

        if (pMouseStruct != NULL){
            POINT   screenpoint;
            HWND    hwndFoundWindow = NULL;

            switch(wParam){
                case WM_LBUTTONDOWN:
                    GetCursorPos (&screenpoint);
                    hwndFoundWindow = WindowFromPoint (screenpoint);
                    qDebug() << "1. Mouse click! (Left), x= " << screenpoint.x << ", y= " << screenpoint.y;
                    qDebug() << "2. hwndFoundWindow=" << hwndFoundWindow
                break;

                case WM_RBUTTONDOWN:
                    GetCursorPos (&screenpoint);
                    hwndFoundWindow = WindowFromPoint (screenpoint);
                    qDebug() << "Mouse click! (Right)" ;
                break;

            }

        }
        return CallNextHookEx(hMouseHook, nCode, wParam, lParam);
    }

如果有任何想法和解决方案，请帮助我。 非常感谢。