property CommandHandler: TIdCommandHandler;

CommandHandler is a read-only TIdCommandHandler property that represents the command handler that created the TIdCommand object instance. CommandHandler is assigned when the object instance is created as the peer thread is executed in TIdCommandHandler.Check. CommandHandler provides access to the TIdCommandHandler properties that indicates the Command string executed by the peer thread, delimiters for both the command and optional parameters, and reply content and exception codes.