-const wxEventType wxEVT_QUERY_LAYOUT_INFO = wxEVT_FIRST + 1500;
-const wxEventType wxEVT_CALCULATE_LAYOUT = wxEVT_FIRST + 1501;
+#include "wx/event.h"
+
+BEGIN_DECLARE_EVENT_TYPES()
+ DECLARE_EXPORTED_EVENT_TYPE(WXDLLIMPEXP_ADV, wxEVT_QUERY_LAYOUT_INFO, 1500)
+ DECLARE_EXPORTED_EVENT_TYPE(WXDLLIMPEXP_ADV, wxEVT_CALCULATE_LAYOUT, 1501)
+END_DECLARE_EVENT_TYPES()