title: How to add tooltip/dropdown/popup to UDF/user-defined Excel 2010 function?
body: <p>I would love to be able to add tooltip/dropdown/popup to my user-defined Excel 2010 functions.</p>
  
  <p>The similar thing can be seen from VLOOKUP function as below screenshot.</p>
  
  <p>If you know how to create it, please share.</p>
  
  <p><img src="https://i.stack.imgur.com/B8IGR.png" alt="enter image description here"></p>