I am looking for a way to add a custom tab in the Excel ribbon which would carry a few buttons. I chanced on some resources addressing it via Google but all look dodgy and o
Another approach to this would be to download Jan Karel Pieterse's free Open XML class module from this page: Editing elements in an OpenXML file using VBA
With this added to your VBA project, you can unzip the Excel file, use VBA to modify the XML, then use the class to rezip the files.