Broadcasts a chat message to the all the users in the lobby
users in the lobby (including the local user) will receive a LobbyChatMsg_t callback
returns true if the message is successfully sent
pvMsgBody can be binary or text data, up to 4k
if pvMsgBody is text, cubMsgBody should be strlen( text ) + 1, to include the null terminator
public static bool SendLobbyChatMsg(CSteamID steamIDLobby, byte[] pvMsgBody, int cubMsgBody) { InteropHelp.TestIfAvailableClient(); return NativeMethods.ISteamMatchmaking_SendLobbyChatMsg(steamIDLobby, pvMsgBody, cubMsgBody); }