Winsock IPX/SPX Annex

This section describes Winsock extensions specific to Internetwork Packet Exchange/Sequenced Packet Exchange (IPX/SPX). It also describes aspects of base Winsock functions that either require special consideration or may exhibit unique behavior.

Protocol name(s)IPX, SPX
DescriptionProvides transport services over the IPX networking layer: IPX for unreliable datagrams, SPX for reliable, connection-oriented message streams.
Address familyAF_IPX
Header fileWsipx.h


This section discusses how to use Winsock with the IPX family of protocols, enabling traditional IPX applications to be ported to Winsock. IPX networks operate in a fundamentally different manner than IP networks, so such differences must be considered when using IPX/SPX.