void UpdateDocuments()
        {
            int docId = this.CurrentDocumentId;

            Document.UpdateDocuments(this.dtDocumentsUpdated);
            bool newDoc, urgent;

            if (AreDocumentsChanged(out newDoc, out urgent))
            {
                bool initialLoad = this.dtDocuments == null;
                if (initialLoad)
                {
                    dtDocuments = DataTableUtils.Clone(dtDocumentsUpdated);
                    Sort(this.tbbSortByDate);
                }
                else
                {
                    DataTableUtils.CopyRows(dtDocumentsUpdated, dtDocuments);
                }
                dataGrid.DataSource = this.dtDocuments;
                CurrentDocumentId   = docId;
                DataGridUtils.SelectCurRow(dataGrid);
                UpdateInfo();
                UpdateControls();
                if (!initialLoad)
                {
                    if (urgent)
                    {
                        Utils.MessageBoxExcl("Urgent request received.");
                        //					Microsoft.VisualBasic.Interaction.Beep();
                    }
                    else if (newDoc)
                    {
                        Utils.MessageBoxExcl("New request received.");
                    }
                    if (App.ScanHandler != null)
                    {
                        DocumentForm form = App.ScanHandler as DocumentForm;
                        if (form != null)
                        {
                            DocumentState docStateId = (DocumentState)form.Document.DocumentStateId;
                            if (docStateId == DocumentState.Discarded || docStateId == DocumentState.Removed)
                            {
                                int  openedDocId  = form.Document.DocumentId;
                                bool hasOpenedDoc = false;
                                foreach (DataRow dr in dtDocuments.Rows)
                                {
                                    Document doc = new Document(dr);
                                    if (doc.DocumentId == openedDocId)
                                    {
                                        hasOpenedDoc = true;
                                        break;
                                    }
                                }
                                if (!hasOpenedDoc)
                                {
                                    Utils.MessageBoxExcl("Request canceled. Please close the form.");
                                    form.Discard();
                                }
                            }
                        }
                    }
                }
            }
        }