Associate action to button on an Eclipse RCP application

Hi all,
I'm developing an Eclipse (3.3) RCP application and I have a problem.
I created some custom actions like this:

public class InsertTableRecordAction extends Action
                    implements ISelectionListener, IWorkbenchAction {
    private final IWorkbenchWindow window;
    private IStructuredSelection selection;

    public InsertTableRecordAction(IWorkbenchWindow window) {
        this.window = window;
        setId("InsertTableRecordAction");
        ...
        window.getSelectionService().addSelectionListener(this);
    }

    public void selectionChanged(IWorkbenchPart part, ISelection incoming) {
        selection = (some kind of cast) incoming;
        setEnabled(depends on selection type);
    }
}

In the ActionBarAdvisor file I created the actions and filled all the menu
and tool bar. And it works fine.

Now, I created an EditorPart with some SWT widgets in it. Some of these
widgets are normal Button.
I want to link my custom action to these buttons, so they run the action
code and they enables concerning the action logic.

How can I associate an action to a button?

Thanks
Marco