@item
This function is only available in @code{<ws2tcpip.h>} on some
platforms:
-mingw.
+mingw, MSVC 9.
@item
This function's return type is @code{char *} instead of @code{const char *}
on some platforms:
-AIX 7.1, HP-UX 11, OSF/1 5.1, Solaris 9, mingw.
+AIX 7.1, HP-UX 11, OSF/1 5.1, Solaris 9, mingw, MSVC 9.
@end itemize
Portability problems not fixed by Gnulib: