Patch #569753: Remove support for WIN16.
Rename all occurrences of MS_WIN32 to MS_WINDOWS.
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index ae27b7f..1b45ef7 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -41,7 +41,7 @@
 #include "unicodeobject.h"
 #include "ucnhash.h"
 
-#ifdef MS_WIN32
+#ifdef MS_WINDOWS
 #include <windows.h>
 #endif
 
@@ -2243,7 +2243,7 @@
 				 NULL);
 }
 
-#if defined(MS_WIN32) && defined(HAVE_USABLE_WCHAR_T)
+#if defined(MS_WINDOWS) && defined(HAVE_USABLE_WCHAR_T)
 
 /* --- MBCS codecs for Windows -------------------------------------------- */
 
@@ -2305,7 +2305,7 @@
     return repr;
 }
 
-#endif /* MS_WIN32 */
+#endif /* MS_WINDOWS */
 
 /* --- Character Mapping Codec -------------------------------------------- */