The client application receives long tap events through the MAknLongTapDetectorCallBack interface. 
Use the method HandleLongTapEventL to perform actions
when the long-tap event is received.
void CMyContainer::HandleLongTapEventL( const TPoint& aPenEventLocation, 
                                        const TPoint& aPenEventScreenLocation)
    {
    // perform your actions when the event is received
    }