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I cannot find documentation about the events fire by CExtPageNavigatorWnd control. I would like to know which events are fired by CExtPageNavigatorWnd and information on the events parameters too.

We guess you mean the selection event and, if this is the case, just use a CExtPageNavigatorWnd::g_nMsgSelectionNotification notification. Please follow the steps below:

1. Add a declaration of the handler method to the CMainFrame header:

LRESULT OnPageNavigatorSelectionChabged( WPARAM wParam, LPARAM lParam );

2. Add the following macros to the message map:

ON_REGISTERED_MESSAGE(
            CExtPageNavigatorWnd::g_nMsgSelectionNotification,
            OnPageNavigatorSelectionChabged
            )

3. Add the implementation for this handler to CMainFrame:

LRESULT CMainFrame::OnPageNavigatorSelectionChabged(
            WPARAM wParam,
            LPARAM lParam
            )
{
            lParam;
            const CExtPageNavigatorWnd::SELECTION_NOTIFICATION * pSN =
                        CExtPageNavigatorWnd::SELECTION_NOTIFICATION::FromWPARAM( wParam );
            
            if( pSN->m_bChangedFinally )
            {
                        // selection finished
                        // pSN->m_nPageOld
                        // pSN->m_nPageNew
            }
            else
            {
                        // selection start
                        // pSN->m_nPageOld
                        // pSN->m_nPageNew
            }
            
            // return -1; do not allow to change selection
            
            return 0L;
}

The selection handling is demonstrated in the PageNavigator sample.