| Visual Basic Code | Visual Basic Name | Winsock Code | Description |
| 25005 | WSAEINTR | 10004 | interrupted system call |
| 25010 | WSAEBADF | 10009 | bad file number |
| 25014 | WSAEACCES | 10013 | permission denied |
| 25015 | WSAEFAULT | 10014 | bad address |
| 25023 | WSAEINVAL | 10022 | invalid argument |
| 25025 | WSAEMFILE | 10024 | too many open files |
| 25036 | WSAEWOULDBLOCK | 10035 | operation would block |
| 25037 | WSAEINPROGRESS | 10036 | operation now in progress |
| 25038 | WSAEALREADY | 10037 | operation already in progress |
| 25039 | WSAENOTSOCK | 10038 | socket operation on non-socket |
| 25040 | WSAEDESTADDRREQ | 10039 | destination address required |
| 25041 | WSAEMSGSIZE | 10040 | message too long |
| 25042 | WSAEPROTOTYPE | 10041 | protocol wrong type for socket |
| 25043 | WSAENOPROTOOPT | 10042 | bad protocol option |
| 25044 | WSAEPROTONOSUPPORT | 10043 | protocol not suppported |
| 25045 | WSAESOCKTNOSUPPORT | 10044 | socket type not supported |
| 25046 | WSAEOPNOTSUPP | 10045 | operation not supported on socket |
| 25047 | WSAEPFNOSUPPORT | 10046 | protocol family not supported |
| 25048 | WSAEAFNOSUPPORT | 10047 | address family not supported by protocol family |
| 25049 | WSAEADDRINUSE | 10048 | address already in use |
| 25050 | WSAEADDRNOTVAIL | 10049 | can't assign requested address |
| 25051 | WSAENETDOWN | 10050 | network is down |
| 25052 | WSAENETUNREACH | 10051 | network is unreachable |
| 25053 | WSAENETRESET | 10052 | net dropped connection on reset |
| 25054 | WSAECONNABORTED | 10053 | software caused connection abort |
| 25055 | WSAECONNERESET | 10054 | connection reset by peer |
| 25056 | WSAENOBUFS | 10055 | no buffer space available |
| 25057 | WSAEISCONN | 10056 | socket is already connected |
| 25058 | WSAENOTCONN | 10057 | socket is not connected |
| 25059 | WSAESHUTDOWN | 10058 | can't send after socket shutdown |
| 25060 | WSAETOOMANYREFS | 10059 | too many references,can't splice |
| 25061 | WSAETIMEOUT | 10060 | connection timed out |
| 25062 | WSAECONNREFUSED | 10061 | connection refused |
| 25063 | WSAELOOP | 10062 | too many levels of symbolic links |
| 25064 | WSAENAMETOOLONG | 10063 | file name too long |
| 25065 | WSAEHOSTDOWN | 10064 | host is down |
| 25066 | WSAEHOSTUNREACH | 10065 | no route to host |
| 25067 | WSAENOEMPTY | 10066 | directory not empty |
| 25068 | WSAEPROCLIM | 10067 | too many processes |
| 25069 | WSAEUSERS | 10068 | too many users |
| 25070 | WSAEDQUOT | 10069 | disc quota exceeded |
| 25071 | WSAESTALE | 10070 | stale NFS file handle |
| 25072 | WSAEREMOTE | 10071 | too many levels of remote in path |
| 25092 | WSASYSNOTREADY | 10091 | network subsystem is unavailable |
| 25093 | WSAVERNOTSUPPORTED | 10092 | Winsock dll version out of range |
| 25094 | WSANOTINITIALISED | 10093 | successful WSASTARTUP not yet performed |
| 25102 | WSAHOSTNOTFOUND | 11001 | host not found |
| 25103 | WSATRYAGAIN | 11002 | non-authoritative host not found |
| 25104 | WSANORECOVERY | 11003 | non-recovery error |
| 25105 | WSANODATA | 11004 | valid name.no data record for requested name |