Epson AcuLaser C4100 Reference Manual page 378

3. Select the EPSON BarCode Font you want to use, then set the
font size and click OK.
Note:
In Windows XP, 2000, and NT 4.0, you cannot use font sizes larger
than 96 points when printing bar codes.
4. The characters you selected appear as bar code characters
similar to those shown below.
378
Working with Fonts