c++internet-explorer-11ui-automationbho

Running UI Automation code in BHO

I have BHO for IE11 and I am running UI Automation code inside it using separate thread. This code should search particular elements in IE gui. I am using

 IUIAutomationElement::FindAll()

method to get array of elements which fits simple control type condition.

The problem is resulting array 

IUIAutomationElementArray

is always empty.

The same code executed from console app works as expected.

Why UI Automation does not work from BHO? Is there some restrictions?

Solution

  • IE Protection Mode was the reason. Looks like BHO is very unpopular technology.