HorizontalPanel horiz = new HorizontalPanel();
final ListBox box = new ListBox();
LoadingPopup.showMessage( constants.PleaseWaitDotDotDot() );
RepositoryServiceAsync repositoryService = GWT.create(RepositoryService.class);
repositoryService.listStates(new GenericCallback<String[]>() {
public void onSuccess(String[] list) {
box.addItem(constants.ChooseOne());
for (String aList : list) {
box.addItem(aList);
}