Issue Mapping "Hide" Button in AvalonDock Windows (Xceed.Wpf.AvalonDock.dll 3.1.0.0)

If a user is using keyboard, can the user interact with these windows and close them. If so you can use https://support.smartbear.com/testcomplete/docs/reference/test-objects/members/onscreen/keys-action-onscreen-object.html and send keystrokes.

Also since you were able to map most of the elements I will also assume that using spy you should be able to detect the docked window itself and determine the x button relation to the window and in its different mappings to manually edit the recognition.