Evaluate the improvement on the formation of a barcode for products

We can automatically generate a stroke. product code http://i.imgur.com/myJv8Lf.png Is it possible to add the ability to write a variable here. I need to be able to write numbers, for example 1010[article] and it itself threw the check digit. Now I can only indicate numbers as a prefix, but for me it turns out that the prefix of Ukrainian barcodes + the number of symbols of the article = 12 characters and 13 is necessary for the system to throw itself (check digit) and it is necessary that it was possible to insert the variable "article" of the product into the template for creating a barcode