On-Tap Plus lets you print bar codes from any application on any printer. Simply surround the information to bar code with a special character and you can print UPC, EAN, Code 39, I2 of 5, MSI, PostNet , 2D bar codes and many more. On-Tap Plus lets you print bar codes from any application on any printer.Simply surround the information to bar code with a special character and you can print UPC, EAN, Code 39, I2 of 5, MSI, PostNet , 2D bar codes and many more. Include different bar codes with different characteristics on the same page. Control bar code ratio, height, check digit, density, orientation, human readable characters and bar code placement. The information that is marked for bar coding can be part of a letter produced by word processing software, information in a spreadsheet program, data in a database manager program, information from an accounting program or a part of most any other application program. Some examples of popular applications in which On-Tap is used to add bar codes include\; checks\; documents\; forms\; invoices\; purchase orders\; inventory tickets\; shipping labels and shelf labels. On-Tap sets up quickly and is easy to use.