 <p>You could loop through the AOT using the TreeNode class and select elements where the label property is blank. Then you can send the information out to the infolog or whatever you wish.</p> <p>There are numerous code examples out there of how to do that, such as <a href="https://blogs.msdn.microsoft.com/dsiebold/2010/08/13/use-x-to-loop-through-the-aot/" rel="nofollow">this one looping over forms selecting on the HTMLHelpTopic property.</a></p>