fUsePanel
if (fUsePanel && fUsePanel->RefFilter())
delete fUsePanel->RefFilter();
delete fUsePanel;
if (!fUsePanel) {
fUsePanel = new DirectoryFilePanel(B_OPEN_PANEL, &messenger,
fUsePanel->Show();
fUsePanel->GetPanelDirectory(&ref);
fUsePanel->Hide();
DirectoryFilePanel* fUsePanel;