3.1.5.16 DPSP_MSG_GROUPDATACHANGED

Only the owner of a group is allowed to change the group's data, and it does so by sending the DPSP_MSG_GROUPDATACHANGED (section 2.2.31) message. The owner of the group is the DirectPlay client that created the group. When a DirectPlay client is destroyed, so are any groups that it created.

When a DirectPlay client receives a DPSP_MSG_GROUPDATACHANGED message, it MUST locate the specified GroupID in the Group List using the information contained in the message and update the per-game data associated with the group. The DirectPlay client SHOULD inform any higher-level entity of the arrival of this message.