[Arkshine]

Probably something like that :

    register_message ( SVC_TEMPENTITY, "m_TextMessage" );
    
    m_TextMessage ( msg_id, msg_type, msg_entity )
    {
        if ( get_msg_arg_int ( 1 ) == TE_TEXTMESSAGE )
        {
            new s_Message[ 256 ];
            get_msg_arg_string ( 18, s_Message, charsmax ( s_Message ) );
            
            log_amx ( "s_Message = %s", s_Message );
        }
    }