static const size_t INVALID_PAGE = (size_t)-1;
 
-DEFINE_EVENT_TYPE(wxEVT_COMMAND_NOTEBOOK_PAGE_CHANGED)
-DEFINE_EVENT_TYPE(wxEVT_COMMAND_NOTEBOOK_PAGE_CHANGING)
-
 // ----------------------------------------------------------------------------
 // private classes
 // ----------------------------------------------------------------------------
 // ============================================================================
 
 IMPLEMENT_DYNAMIC_CLASS(wxNotebook, wxBookCtrlBase)
-IMPLEMENT_DYNAMIC_CLASS(wxNotebookEvent, wxCommandEvent)
 
 // ----------------------------------------------------------------------------
 // wxNotebook creation