-const wxEventType wxEVT_COMMAND_HEADER_DCLICK = wxNewEventType();
-const wxEventType wxEVT_COMMAND_HEADER_RIGHT_DCLICK = wxNewEventType();
-const wxEventType wxEVT_COMMAND_HEADER_MIDDLE_DCLICK = wxNewEventType();
+wxDEFINE_EVENT( wxEVT_COMMAND_HEADER_DCLICK, wxHeaderCtrlEvent);
+wxDEFINE_EVENT( wxEVT_COMMAND_HEADER_RIGHT_DCLICK, wxHeaderCtrlEvent);
+wxDEFINE_EVENT( wxEVT_COMMAND_HEADER_MIDDLE_DCLICK, wxHeaderCtrlEvent);