How can one tell whether a user has changed/edited/deleted/added a formula in an Excel worksheet using C# VSTO?
So far, what I have been thinking about is to attach an event handler which can tell me whether the user is changing a cell. But even this approach is problematic because existing events relating to user editing cells do not seem to be able to tell you the previous and the new value, so I do not really know if an old formula is being overwritten. What is the right approach to this question?
