code: public int doSetData(Object data, boolean bDisplayOption, int iMoveMode)
      {
          if ((data != null) && (!(data instanceof Float)))
              return DBConstants.ERROR_RETURN;
          return super.doSetData(data, bDisplayOption, iMoveMode);
      }
docs: Move this physical binary data to this field.
  @param data The physical data to move to this field (must be Float raw data class).
  @param bDisplayOption If true, display after setting the data.
  @param iMoveMode The type of move.
  @return an error code (0 if success).