overrides the OfferKeyEventL method in container class(drived from CCoeControl)

TKeyResponse CMailListContainer::OfferKeyEventL(const TKeyEvent &aKeyEvent, TEventCode aType)
{
    TInt code = aKeyEvent.iCode;
    if (iListBox)
    {
        if (code == EKeyEnter || code == EKeyOK || code == EKeyLeftShift)\
        {
            TBool shiftKeyPressed = ( aKeyEvent.iModifiers & EModifierShift );
            if (!shiftKeyPressed)
            {
    //這里寫點確認鍵后的操作 return EKeyWasConsumed;
   }
   else
   {
    return iListBox->OfferKeyEventL(aKeyEvent, aType);
   }
  }
  else
  {
   return iListBox->OfferKeyEventL(aKeyEvent, aType);
  }
 }
 return EKeyWasNotConsumed;
}