public Menu(UC_CONTROLE_Documents parent)
 {
     _UCDoc = parent;
     _BW_Menu = new BackgroundWorker();
     _BW_Menu.WorkerReportsProgress = true;
     _BW_Menu.WorkerSupportsCancellation = true;
     _BW_Menu.ProgressChanged += BW_Menu_ProgressChanged;
     _BW_Menu.DoWork += new DoWorkEventHandler(BW_WORK_GetMenuDocument);
     _BW_Menu.RunWorkerCompleted += _BW_Menu_RunWorkerCompleted;
     listeDesSections = new List<Section>();
 }
            public DisplayArea(UC_CONTROLE_Documents parent)
            {
                _parent = parent;

                _BW_Display = new BackgroundWorker();
                _BW_Display.WorkerReportsProgress = true;
                _BW_Display.WorkerSupportsCancellation = true;
                _BW_Display.ProgressChanged += BW_Display_ProgressChanged;
                _BW_Display.DoWork += new DoWorkEventHandler(BW_WORK_DisplayDocuments);
                _BW_Display.RunWorkerCompleted += BW_Display_RunWorkerCompleted;
            }