#include <ws2tcpip.h>
#define socket_error() WSAGetLastError()
-#undef EWOULDBLOCK
-#undef EINTR
-#undef EINPROGRESS
-#define EWOULDBLOCK WSAEWOULDBLOCK
-#define EINTR WSAEINTR
-#define EINPROGRESS WSAEINPROGRESS
int inet_aton(const char *cp, struct in_addr *ia);