HTML Screen Elements Hierarchy
For web applications, the root branch is the iexplore process.The next level includes Win32 objects that are parents for a sub-branch that specifies the URL of the HTML page (HTML Document screen element). Under the HTML Document is each HTML screen element that you captured in the document.
Each HTML screen element has its own class name that starts with the prefix HTML.
Internal frames are HTML documents that are not the main document of the browser. When capturing internal documents in the web application, these documents are located under the basic (parent) HTML document level in the Screen Elements tree.

