-extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_HEADER_DCLICK;
-extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_HEADER_RIGHT_DCLICK;
-extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_HEADER_MIDDLE_DCLICK;
+wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_COMMAND_HEADER_DCLICK, wxHeaderCtrlEvent );
+wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_COMMAND_HEADER_RIGHT_DCLICK, wxHeaderCtrlEvent );
+wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_COMMAND_HEADER_MIDDLE_DCLICK, wxHeaderCtrlEvent );