m_music_model = new MyMusicTreeModel;
m_ctrl[0]->AssociateModel( m_music_model.get() );
-#if wxUSE_DRAG_AND_DROP
+#if wxUSE_DRAG_AND_DROP && wxUSE_UNICODE
m_ctrl[0]->EnableDragSource( wxDF_UNICODETEXT );
m_ctrl[0]->EnableDropTarget( wxDF_UNICODETEXT );
-#endif // wxUSE_DRAG_AND_DROP
+#endif // wxUSE_DRAG_AND_DROP && wxUSE_UNICODE
// column 0 of the view control: