Symbian 动态改变CBA按钮

.rss
RESOURCE CBA r_yourapp_softkeys_options_open
    {
    buttons = 
        {
        CBA_BUTTON { id = EAknSoftkeyOptions; txt = "Options"; },
        CBA_BUTTON { id = EYourAppCmdOpenApp; txt = "Open"; }
        };
    }
RESOURCE CBA r_yourapp_softkeys_options_stop
    {
    buttons = 
        {
        CBA_BUTTON { id = EAknSoftkeyOptions; txt = "Options"; },
        CBA_BUTTON { id = EYourAppCmdStopApp; txt = "Stop"; }
        };
    }
.hrh
enum TYourAppCommandIds
    {
    id=EYourAppCmdOpenApp,
    id=EYourAppCmdStopApp,
    };
.cpp
void CYourAppUi::SetCommandSetL(TInt aResourceId)
    {
    CEikButtonGroupContainer* cba = CEikButtonGroupContainer::Current();
    cba->SetCommandSetL(aResourceId);
    cba->DrawNow();
    }
SetCommandSetL(R_YOURAPP_SOFTKEYS_OPTIONS_OPEN);
SetCommandSetL(R_YOURAPP_SOFTKEYS_OPTIONS_STOP);