When the default .NET combo box is tested with the Coded UI there is an AccessViolationException. This can be reproduced with the attached project (run test method 2).
Hi Bob, We have informed Microsoft about this issue being present in VS2013 as well. Hopefully, they will include a fix for it in a next update/release. If/when we hear back from them, we will update this thread.
This is also an issue in Visual Studio 2013. I just checked the patch that Microsoft did to 2013 mentioned here: http://feedback.telerik.com/Project/154/Feedback/Details/151802-add-codedui-support-for-visual-studio-2013-and-2015 This patch did resolve our ui mapping issues in 2013, but it still has the Access Violation exception thrown when you try to access a standard .net control or try to send keystrokes using the .net keyboard class. This is the same behavior we see in VS2015.
We have investigated this case and it appears to be an issue with Microsoft implementation of CodedUI. After discussion with them, we were assured that a fix will be introduced with the next update of Visual Studio 2015, probably Update 4 and/or the next Visual Studio version. Once either of these is introduced, this should be resolved.