-bool WXDLLEXPORT wxTransferFileToStream(const wxString& filename, wxOutputStream& stream);
-bool WXDLLEXPORT wxTransferStreamToFile(wxInputStream& stream, const wxString& filename);
+bool WXDLLIMPEXP_CORE wxTransferFileToStream(const wxString& filename, wxOutputStream& stream);
+bool WXDLLIMPEXP_CORE wxTransferStreamToFile(wxInputStream& stream, const wxString& filename);