CalcIntegerLength

        private static int CalcIntegerLength(int iLen)
        {
            //String str_iLen = Convert.ToString(iLen);
            int strLen = 0;// str_iLen.Length;
            do
            {
                strLen += 1;
                iLen /= 10;
            } while (iLen != 0);
            return strLen;
        }