-extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_LISTBOOK_PAGE_CHANGED;
-extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_LISTBOOK_PAGE_CHANGING;
+wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_COMMAND_LISTBOOK_PAGE_CHANGED, wxBookCtrlEvent );
+wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_COMMAND_LISTBOOK_PAGE_CHANGING, wxBookCtrlEvent );