Comments by srvypro (Top 1 by date)

It's part of the window plugin. Docs are here: https://wiki.servoy.com/display/public/DOCS/window

An example:
// create a new window
var win = application.createWindow("windowName", JSWindow.WINDOW);
// show a form in the new window
forms.my_form.controller.show(win);
// retrieve the menubar of the new window
var menubar = plugins.window.getMenuBar("windowName");
// add a new menu to the menubar, with an item in it
var menu = menubar.addMenu();
menu.text = "New Menu";
menu.addMenuItem("an entry", feedback);
// retrieve the menubar of the main window
var mainMenubar = plugins.window.getMenuBar();
// add a new menu to the menubar of the main window
var menuMain = mainMenubar.addMenu();
menuMain.text = "New Menu in Main Menubar";
menuMain.addMenuItem("another entry", feedback);