How to tell if Excel Application is in cell-edit mode?

Question

I\'m writing an Excel Addin using COM Interop from .net. I have a command that pops up a dialog, and from the dialog I do some work like collecting data from the used range

Answer 1

There is an Application.Ready property that is supposed to give you this information but in practice it doesn't work reliably. See here for a hackaround.

You might also want to look at setting Application.Interactive=false while your .net code is doing its stuff.