SF bug 418296: WinMain.c should use WIN32_LEAN_AND_MEAN.
I believe Kevin Rodgers here!  The old WINDOWS_LEAN_AND_MEAN has, AFAICT,
always been wrong.
diff --git a/PC/WinMain.c b/PC/WinMain.c
index 4249567..7ee1ad6 100644
--- a/PC/WinMain.c
+++ b/PC/WinMain.c
@@ -1,6 +1,6 @@
 /* Minimal main program -- everything is loaded from the library. */
 
-#define WINDOWS_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 
 #include "Python.h"