BOOST_TEST( ex.code().category() == system_category() );
# ifdef BOOST_WINDOWS_API
LANGID language_id;
-# if !defined(__MINGW32__) && !defined(__CYGWIN__) && !BOOST_PLAT_WINDOWS_RUNTIME
+# if !BOOST_PLAT_WINDOWS_RUNTIME
language_id = ::GetUserDefaultUILanguage();
# else
language_id = 0x0409; // Assume US English