len = SteamAPI_ISteamNetworkingSockets_ReceiveMessagesOnPollGroup(
hSteamNetworkingSockets,
client_pollgroup, messages, vg_list_size(messages) );
len = SteamAPI_ISteamNetworkingSockets_ReceiveMessagesOnPollGroup(
hSteamNetworkingSockets,
client_pollgroup, messages, vg_list_size(messages) );