-extern WXDLLEXPORT_DATA(wxBitmap) wxNullBitmap;
-extern WXDLLEXPORT_DATA(wxIcon) wxNullIcon;
-extern WXDLLEXPORT_DATA(wxCursor) wxNullCursor;
-extern WXDLLEXPORT_DATA(wxPen) wxNullPen;
-extern WXDLLEXPORT_DATA(wxBrush) wxNullBrush;
-extern WXDLLEXPORT_DATA(wxPalette) wxNullPalette;
-extern WXDLLEXPORT_DATA(wxFont) wxNullFont;
-extern WXDLLEXPORT_DATA(wxColour) wxNullColour;
-extern WXDLLEXPORT_DATA(wxIconBundle) wxNullIconBundle;
+extern WXDLLIMPEXP_DATA_CORE(wxBitmap) wxNullBitmap;
+extern WXDLLIMPEXP_DATA_CORE(wxIcon) wxNullIcon;
+extern WXDLLIMPEXP_DATA_CORE(wxCursor) wxNullCursor;
+extern WXDLLIMPEXP_DATA_CORE(wxPen) wxNullPen;
+extern WXDLLIMPEXP_DATA_CORE(wxBrush) wxNullBrush;
+extern WXDLLIMPEXP_DATA_CORE(wxPalette) wxNullPalette;
+extern WXDLLIMPEXP_DATA_CORE(wxFont) wxNullFont;
+extern WXDLLIMPEXP_DATA_CORE(wxColour) wxNullColour;
+extern WXDLLIMPEXP_DATA_CORE(wxIconBundle) wxNullIconBundle;