How to get event that selected tab is change

BEGIN_MESSAGE_MAP(CMainFrame, CXTPFrameWnd)
    ....
    ON_NOTIFY(TCN_SELCHANGE, XTP_ID_RIBBONCONTROLTAB, OnRibbonTabChanged)
    ON_NOTIFY(TCN_SELCHANGING, XTP_ID_RIBBONCONTROLTAB, OnRibbonTabChanging)
    ....
END_MESSAGE_MAP()

void CMainFrame::OnRibbonTabChanged(NMHDR* pNMHDR, LRESULT* pRes) 
{
    NMXTPTABCHANGE* pNMTabChanged = (NMXTPTABCHANGE*)pNMHDR;

    if (pNMTabChanged->pTab)
    {
        TRACE(_T("Tab Changed, Caption = %s\n"), (LPCTSTR)pNMTabChanged->pTab->GetCaption());
    }
    
    *pRes = 0;
}

void CMainFrame::OnRibbonTabChanging(NMHDR* /*pNMHDR*/, LRESULT* pRes) 
{

    *pRes = 0;    
}

BOOL CXTPRibbonBar::OnTabChanging(CXTPRibbonTab* pTab)
{
    NMXTPTABCHANGE nm;
    nm.pTab = pTab;

    return (BOOL)m_pControlTab->NotifySite(TCN_SELCHANGING, &nm);
}

void CXTPRibbonBar::OnTabChanged(CXTPRibbonTab* pTab)
{
    NMXTPTABCHANGE nm;
    nm.pTab = pTab;

    m_pControlTab->NotifySite(TCN_SELCHANGE, &nm);
}