code: public void setupKeyBuffer(BaseBuffer destBuffer, int iAreaDesc)
      {
          int iKeyFields = this.getKeyFields();
          m_rgobjTempData = new Object[iKeyFields];
          for (int iKeyFieldSeq = Constants.MAIN_KEY_FIELD; iKeyFieldSeq < iKeyFields + Constants.MAIN_KEY_FIELD; iKeyFieldSeq++)
          {
              m_rgobjTempData[iKeyFieldSeq] = this.getField(iKeyFieldSeq).getData();
          }
      }
docs: Set up the key area indicated.
  <br />Note: The thin implementation is completely different from the thick implementation
  here, the areadesc is ignored and the thin data data area is set up instead.
  @param destBuffer (Always ignored for the thin implementation).
  @param iAreaDesc (Always ignored for the thin implementation).