public static void main (String [] args) {
	Display display = new Display ();
	Shell shell = new Shell (display);
	shell.setText ("Shell");
	shell.setSize (200, 200);
	shell.open ();
	Shell dialog = new Shell (shell);
	dialog.setText ("Dialog");
	dialog.setSize (200, 200);
	dialog.open ();
	while (!shell.isDisposed ()) {
		if (!display.readAndDispatch ()) display.sleep ();
	}
	display.dispose ();
}