The IPX service provider uses Winsock to communicate over a local area network (LAN) using the Internet Packet Exchange (IPX) protocol. The service provider only supports nonguaranteed messaging. A single computer can host only one DirectPlay session using IPX.
IPX always uses a broadcast to find sessions on the network, so the IDirectPlay3::EnumSessions method will not display a dialog box requesting IP addresses.
IPX will not enumerate sessions on another subnet.
Once a session is established, packets are sent directly between computers (they are not broadcast).
This service provider can be identified using the symbol definition DPSPGUID_IPX.