🚀 go-pugleaf

I'm trying to intercept the close of a JInternalFrame and I think I'm
doing it correctly, but it's not working.  Any suggestions??  I could
probably catch it with a VetoableChangeListener, but everything I read
says that I shouldn't have to...

public class MDISheet extends JInternalFrame implements
InternalFrameListener

    public MDISheet() {
        super();
        ...
        setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
        addInternalFrameListener(this);
        ...
    }
    ...
     public void internalFrameClosing(InternalFrameEvent parm1) {
        //not calling dispose() or hide() but it's still closing!!!
        ...
    }
}

Thanks,

Jim Stoll
jestoll@crtinc.com