pointerDriver = new MyPointerDriver();
mouseListener = new MouseHandler();
screen.addMouseListener(mouseListener);
screen.addMouseMotionListener(mouseListener);
screen.addMouseWheelListener(mouseListener);
pointerDevice = new Device(new Bus((Bus) null) {
}, "");
try {
pointerDevice.setDriver(pointerDriver);
pointerDriver.startDevice();
} catch (DriverException x) {