code: public int fieldChanged(boolean bDisplayOption, int iMoveMode)
      {
          int iErrorCode = this.setupGridOrder();
          if (iErrorCode != DBConstants.NORMAL_RETURN)
              return iErrorCode;
          return super.fieldChanged(bDisplayOption, iMoveMode);
      }
docs: The Field has Changed.
  Change the key order to match this field's value.
  @param bDisplayOption If true, display the change.
  @param iMoveMode The type of move being done (init/read/screen).
  @return The error code (or NORMAL_RETURN if okay).