typdef DPMSG_GENERIC DPMSG_SESSIONLOST;
typedef DPMSG_SESSIONLOST *LPDPMSG_SESSIONLOST;
This message is generated by DirectPlay when the connection to all the other players in the session is lost. After the session is lost, messages cannot be sent to remote players, but all data at the time the session was lost is still available. Your applications should try to recover gracefully and exit if this message is received.