I am using VSTO to develop a C# addin for Excel.

I have several commands in the ribbon that I do not want to be available if
the user has double clicked on a cell and is entering text.

How can I disable my buttons when the user is in either edit or enter mode?
(in the same way the ms alignment, styles etc buttons are disabled)

Also, is there any property I can use to discover the mode excel is in? I
have tried the application.ready property but it isn't what I'm looking for.