Gets a value indicating whether this element has keyboard focus. This is a dependency property.
Assembly: PresentationCore (in PresentationCore.dll)
Metadata properties set to true
Changes to the determined value of this property may be accompanied by focus-related events.
and IsKeyboardFocusWithin are commonly used within class event handlers for other input-related events, for instance to determine whether the element already has keyboard focus, or to make determinations when mouse events and keyboard events occur in conjunction.