ItemAutomationPeer.SetFocusCore Method
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Sets the keyboard input focus on the item element that is associated with this FrameworkElementAutomationPeer. This method is called by SetFocus.
Assembly: System.Windows (in System.Windows.dll)
If the item is a UIElement with its own peer as reported by Owner, then that UIElement receives focus. If there is on owner, but there is a container peer (which could be ItemsControlAutomationPeer, ListBoxAutomationPeer, or another class) then the container peer receives focus. Finally, if there is no container peer, then this method does nothing.