Just a comment:

I didn't have any trouble using a bar code font on documents I was creating but you have to make sure that the check-digit is correctly calculated for all possible values. The functions included above look great!

Its simple enough to call a function in the datawindow column which passes the variable data back and returns the data with a check digit affixed.

Marco makes an excellent observation regarding the height of a Code 128 barcode, because there are minimum height and bar/space width specs that scanner manufacturers have to meet. For example, Code 128 requires:

• Height >= 15% of encoded length, and no shorter than 6.5mm (0.256in).
• The width of the thinnest bar or space (the barcode industry calls this value "X"): 0.19mm =< X >= 1.27mm

If the barcodes you produce fall outside of these specifications, you run the risk of the barcode being un-scannable.

You can find more information about Code 128 and other barcodes at:

    https://www.tec-it.com/en/support/knowbase/barcode-overview/linear/Default.aspx
    https://www.barcode.graphics/education-gs1-128-barcode/
    https://www.gs1.org/standards

HTH. Best regards, John

We found this code years ago.

It works fine.

Just add the funktion as attached.  

The font you can download here (for free) or use the one attached one:

https://www.zoll.de/SharedDocs/Downloads/DE/Links-fuer-Inhaltseiten/Fachthemen/Zoelle/Atlas/code_128.html?__blob=publicationFilehttp%3A%2F%2Fwww.zoll.de%2Fe0_downloads%2Fedifact_release_8_0_8_1%2Findex.html

In the datawindow you add a computed column like this:

barcode_128( 'some data' )

choose the font "CODE-128" and set the size at least to 24

Maybe this can help you: http://grandzebu.net/informatique/codbar-en/code128.htm

We've been using ID Automation Univeral Barcode Font with a Windows DLL to encode the strings. Has worked fine in PDFs as far as I know.

ID Automation Universal Barcode Font

It's not horribly expensive, and the Font files are free to distribute.

You create a text object, or column object, assign it to the proper font, call the DLL function to generate the encoded string, place the string in the field, or set the object text.