GC gc= new GC(control.getDisplay());
GC gc= new GC(control);
	private int computeWidth(Control control, String name) {		if (name == null)			return 0;		GC gc= new GC(control.getDisplay());		try {			gc.setFont(JFaceResources.getDialogFont());			return gc.stringExtent(name).x + 10;		} finally {			gc.dispose();		}	}