Not sure where to start with the new Documents for Excel API? Here are the basics, plus a little deeper look into what you can do with charts and pivot tables with no Excel dependency.
Jumping right into developing with a new API can be daunting. Well, at least if you're me it can. Let's walk through the basics together and get rid of any points of pain. We're going to make a gorgeous XLSX file in code with NO Microsoft Excel dependency! Woot!