docs: public String convertIndexToDisStr(int index)
      {
          int iErrorCode = this.moveToIndex(index);
          if (iErrorCode == DBConstants.NORMAL_RETURN)
          {
              if (displayFieldName != null)
                  return m_record.getField(displayFieldName).getString();
              else
                  return m_record.getField(m_iFieldSeq).getString();
          }
          else
              return Constants.BLANK;
      }