Display d = new Display();
        final Shell s = new Shell(d, SWT.SHELL_TRIM);
        s.setLayout(new GridLayout(3, false));
        s.setData(new GridData(SWT.FILL, SWT.FILL, true, true));
        s.setText("App Title");

        Combo one = new Combo(s, SWT.DROP_DOWN | SWT.READ_ONLY);
        one.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
        one.setItems(new String[]{"one", "two", "three"});

        Combo two = new Combo(s, SWT.DROP_DOWN | SWT.READ_ONLY);
        two.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
        two.setItems(new String[]{"one", "two", "three"});


        Combo three = new Combo(s, SWT.DROP_DOWN | SWT.READ_ONLY);
        three.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
        three.setItems(new String[]{"one", "two", "three"});


        s.pack();
        s.open();
        return 0;