3.1.4.11 Set Player Name
When a higher-level entity indicates that the DirectPlay client SHOULD change the name associated with a player and the DirectPlay client has joined a game session, the DirectPlay client MUST format a DPSP_MSG_PLAYERNAMECHANGED (section 2.2.46) message. If the Session.MulticastServer flag is set, the DirectPlay client MUST wrap the DPSP_MSG_PLAYERNAMECHANGED message in a DPSP_MSG_ASK4MULTICAST message (section 2.2.14) and it MUST transmit the wrapped message to the game host. If the Session.MulticastServer flag is not set, the DirectPlay client MUST transmit the DPSP_MSG_PLAYERNAMECHANGED message to each of the computers that are currently joined to the game session. There is no response expected to this message.