#include "wx/panel.h"
-class WXDLLEXPORT wxScrollHelperEvtHandler;
-class WXDLLEXPORT wxTimer;
+class WXDLLIMPEXP_FWD_CORE wxScrollHelperEvtHandler;
+class WXDLLIMPEXP_FWD_CORE wxTimer;
// default scrolled window style: scroll in both directions
#define wxScrolledWindowStyle (wxHSCROLL | wxVSCROLL)