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