line 188 -- // Ask if a user in in the specified group, results returns async by GSUserGroupStatus_t line 190 -- virtual bool RequestUserGroupStatus( CSteamID steamIDUser, CSteamID steamIDGroup ) = 0; line 333 -- // send as a reply to RequestUserGroupStatus() line 334 -- struct GSClientGroupStatus_t Why it's User then Client in the SDK is beyond me... :\