code: public int compareKeys(int iAreaDesc, String strSeekSign, FieldTable table, KeyAreaInfo keyArea)
      {
          int iCompareValue = keyArea.compareKeys(iAreaDesc);
          return iCompareValue;
      }
docs: Compare these two keys and return the compare result.
  @param areaDesc The area that the key to compare is in.
  @param strSeekSign The seek sign.
  @param table The table.
  @param keyArea The table's key area.
  @return The compare result (-1, 0, or 1).