label.setText("N�mero de ocorr�ncias:");
label.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WIDGET_LIGHT_SHADOW));
numberOfOcurrenciesText = new Text(components, SWT.BORDER);
br.com.visualmidia.tools.Validator.validateNumbers(numberOfOcurrenciesText);
numberOfOcurrenciesText.addFocusListener(new RequiredWhenLostFocus(numberOfOcurrenciesText,
RequiredWhenLostFocus.ERROR_REQUIRED_ACCOUNT_NEXT_PAYMENT_DATE, screenMessageLabel));
numberOfOcurrenciesText.setText("0");
numberOfOcurrenciesText.addListener(SWT.FocusIn, new Listener() {
public void handleEvent(Event arg0) {