public CzkemUserTemp GetUserTemp(int userid, int index)
        {
            var data   = string.Empty;
            var length = 0;
            var result = _czkem.GetUserTmpStr(_czkem.MachineNumber, userid, index, ref data, ref length);

            if (result)
            {
                return(new CzkemUserTemp
                {
                    Index = index,
                    Data = data,
                    Length = length,
                });
            }
            return(null);
        }