-HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 7, Cygwin 1.5.x, mingw, Interix 3.5, BeOS.
+HP-UX 11.11, IRIX 6.5, OSF/1 5.1, Solaris 7, Cygwin 1.5.x, mingw, MSVC 9, Interix 3.5, BeOS.
+@item
+On Windows, this function is declared in @code{<ws2tcpip.h>} rather than in
+@code{<netdb.h>}.