QWinThumbnailToolBar troubles

[Franckynos]

Hi,

I use QWinThumbnailToolBar to do some settings.
like this :

QWinThumbnailToolBar* thumbnailToolBar = new QWinThumbnailToolBar(this);
    thumbnailToolBar->setWindow(windowHandle());

    QWinThumbnailToolButton *quitButton = new QWinThumbnailToolButton(thumbnailToolBar);
    quitButton->setToolTip(tr("Quit"));
    quitButton->setIcon(QIcon(":/icones/shutIco"));
    connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));

    QWinThumbnailToolButton *settings = new QWinThumbnailToolButton(thumbnailToolBar);
    settings->setToolTip(tr("Settings"));
    settings->setIcon(QIcon(":/icones/images/parameters.png"));
    settings->setDismissOnClick(true);
    connect(settings, SIGNAL(clicked()), this, SLOT(parametre()));

    QWinThumbnailToolButton* space = new QWinThumbnailToolButton(thumbnailToolBar);
    space->setFlat(true);

    thumbnailToolBar->addButton(quitButton);
    thumbnailToolBar->addButton(space);
    thumbnailToolBar->addButton(settings);

All seems to works. But when I depploy my application, in other folder, I join librarys, especially the Qt5WinExtras.dll, the QWinThumbnailToolBar does not apperas, but my application run correctly ?

Any suggestion ?

Thx