Form Tutorials = new Tutorials();
    Tutorials.getToolbar().setBackCommand(back);
    Tutorials.setBackCommand(back);
    Tutorials.show();

Form folder1/form1 = new folder1/form1();
        folder1/form1.getToolbar().setBackCommand(back);
        folder1/form1.setBackCommand(back);
        folder1/form1.show();