if (-1 == nSubMenuID)
    {
        if (m_FileListViewMode == vImageFilesListBox::FileViewMode_last)
            m_FileListViewMode = vImageFilesListBox::FileViewMode_first;
        else
            m_FileListViewMode = (vImageFilesListBox::FileViewMode)(m_FileListViewMode + 1);
        SetCurrentFileListViewMode(m_FileListViewMode);
        if (nullptr != m_pObj)
            m_pObj->StartTimer(s_nThumbnailModeTimerID, s_nThumbnailModeTimerElapse);
    }
    else
    {
        for (int i = 0; i < countof(s_FileViewModes); ++i)
        {
            if (nSubMenuID == UIX_Str2ID(s_FileViewModes[i].szItemID))
            {
                SetCurrentFileListViewMode((vImageFilesListBox::FileViewMode)i);

                if (nullptr != m_pObj)
                    m_pObj->StartTimer(s_nThumbnailModeTimerID, s_nThumbnailModeTimerElapse);

                break;
            }
        }
    }