public HelpWindow(ResourceBundle bundle){
PropertyConfigurator.configure(ClassLoader.getSystemResource("be/xtnd/commons/log4j.properties"));
try {
ClassLoader cl = HelpWindow.class.getClassLoader();
URL url = HelpSet.findHelpSet(cl, bundle.getString("appli.help_file"));
helpViewer = new JHelp(new HelpSet(cl, url));
EscapeInternalFrame frame = new EscapeInternalFrame();
Object[] args = {bundle.getString("appli.name")};
frame.setTitle(CommonsI18n.tr("{0} Help", args));