Need to make barcodes in Microsoft Office applications? Mail merge with Code 128 barcodes using Excel and Word? Perhaps you're doing UPC barcodes in an Access database.
Wouldn't it be nice to have free sample code like macros, plug-in's, etc. to do all the hard work for you? Heck, who wants to write code from scratch for things like check digits? Not me! I'd rather bolt on a pre-built widget, how about you?