addComboBoxListenerButton.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
if (addComboBoxListenerButton.getSelection()) {
if (iComboBoxListener == null) {
iComboBoxListener = new IComboBoxListener() {
@Override
public void selectedItemChanged(EventObject event) {
Object object = theComponent.getSelectedValue();
if (object != null) {
String selectedValue = object.toString();