Are you interested in an Excel barcode Add-In solution? Well here it is! This is a fully functional shareware barcode add in for Excel. The free code 128 barcode font is included in the Excel barcode add in installer. It may be downloaded below. This barcode add in is fully functional but until it is registered it will display a registration dialog each time Excel calls it.. To install, download the Excel barcode add in and run the setup file. After your initial instalation, open Excel and go to Tools->Add Ins. Find the Excel barcode add in function and select the text box, then hit OK.