QT獲取句柄

HWND appwnd;

    appwnd = (HWND)this->winId();

    QString ClassName("Qt5QWindowIcon");

    QString AppName = QStringLiteral("GG");

    LPCWSTR app = reinterpret_cast<LPCWSTR>(ClassName.data());

    LPCWSTR appCaption = reinterpret_cast<LPCWSTR>(AppName.data());

    appwnd = ::FindWindow(app, appCaption);

    HWND hwnd;

    hwnd=(HWND)myWidget->winId();


 qDebug() << "----------創建預覽窗口-------------"<<hwnd;

    qDebug() << "----------創建預覽窗口-------------"<<(unsigned long)hwnd;

    qDebug() << "----------創建預覽窗口-------------"<<myWidget->winId();

    qDebug() << "----------創建預覽窗口-------------"<<this->winId();