This topic applies only to applications written in C++.

The IDirectPlayLobby3 interface lets game developers launch external applications, enable communication between an application and a lobby client, and manipulate DirectPlay addresses. For an overview of lobby sessions, see Lobbies. For practical information about detecting a launch by an external lobby and registering lobby-aware applications, see Building Lobby-Aware Applications.

The include file Dplobby.h also declares the IDirectPlayLobby and IDirectPlayLobby2 COM interfaces. IDirectPlayLobby contains the methods required to run applications written for DirectX versions 1, 2, and 3. IDirectPlayLobby2 contains the methods required to run applications written for DirectX version 5.0. Although you could use these interfaces to create new applications, it is recommended that you use IDirectPlayLobby3 in order to take advantage of its increased functionality. For more information, see Migrating from Previous Versions of DirectX.