-#if defined(__WXMSW__)
-class WXDLLEXPORT wxIconLocation;
-#else
-class WXDLLEXPORT wxIconLocationBase;
-typedef wxIconLocationBase wxIconLocation;
-#endif //defined(__WXMSW__)
-class WXDLLEXPORT wxFileTypeImpl;
-class WXDLLEXPORT wxMimeTypesManagerImpl;
+class WXDLLIMPEXP_BASE wxIconLocation;
+class WXDLLIMPEXP_BASE wxFileTypeImpl;
+class WXDLLIMPEXP_BASE wxMimeTypesManagerImpl;