Code:
TKeyResponse Ctest1Container2::OfferKeyEventL(const TKeyEvent& aKeyEvent,TEventCode aType)
{
     if(aKeyEvent.iCode == EKeyOK)
     {
                  if(iCba == R_AVKON_SOFTKEYS_OPTIONS_BACK)
                  {

                            CEikButtonGroupContainer* cba = CEikButtonGroupContainer::Current();

                            cba->SetCommandSetL(R_AVKON_SOFTKEYS_CANCEL);

                            cba->MakeVisible(EFalse);  //Add this line to the source code

                            cba->DrawNow();

                            cba->MakeVisible(ETrue);   //Add this line to the source code

                            //CEikonEnv::Static()->InfoWinL(_L("info"), _L("hi"));

  

                             iCba = R_AVKON_SOFTKEYS_CANCEL;

                  }
                  else
                  {

                           CEikButtonGroupContainer* cba = CEikButtonGroupContainer::Current();

                           cba->SetCommandSetL(R_AVKON_SOFTKEYS_OPTIONS_BACK);            

                           cba->MakeVisible(EFalse); //Add this line to the source code

                           cba->DrawNow();

                           cba->MakeVisible(ETrue); //Add this line to the source code

                           //CEikonEnv::Static()->InfoWinL(_L("info"), _L("hi"));

 

                           iCba = R_AVKON_SOFTKEYS_OPTIONS_BACK;

                  }
                  return EKeyWasConsumed;
      }
      return EKeyWasNotConsumed;
}