typedef struct XblMultiplayerActivityDetails {  
    XblMultiplayerSessionReference SessionReference;  
    char HandleId[XBL_GUID_LENGTH];  
    uint32_t TitleId;  
    XblMultiplayerSessionVisibility Visibility;  
    XblMultiplayerSessionRestriction JoinRestriction;  
    bool Closed;  
    uint64_t OwnerXuid;  
    uint32_t MaxMembersCount;  
    uint32_t MembersCount;  
    const char* CustomSessionPropertiesJson;  
} XblMultiplayerActivityDetails