title: How to handle Excel menu change / click event in C#
body: <p><img src="https://i.stack.imgur.com/YLz0l.png" alt="enter image description here">I have created Office 2010 Excel AddIn using AddIn Express product. I am using AddIn Express to support different version of Excel. During add-in load, I am authenticating user, which takes around 1-2 seconds for intranet users and external users are authenticated using form based authentication. Once authenticated, add-in gets loaded successfully and it shows application name in Excel menu. </p>
  
  <p>I want to know if it is at all possible to authenticate user when s/he clicks on application menu name under Excel menu, as it might be the case that user want to use Excel only and not the Add-in. As of now, since I am authenticating user each time s/he starts Excel, it adds a delay in starting Excel. I am not able to identify proper event / method which I can handle when user clicks on application menu name. </p>
  
  <p>I would really appreciate some help. </p>
  
  <p>Thanks.</p>