Gets or sets a value that indicates whether focus traversal has reached the end of child elements that can have focus.
Assembly: WindowsBase (in WindowsBase.dll)
Focusable elements are those elements where the Focusable property is true.
This parameter is primarily intended to communicate whether traversal using tab stops should wrap when calling the methods TabInto, TabInto,or.OnNoMoreTabStops. If you are passing focus to an object that implements IKeyboardInputSink, then specifying true for will result in that true value being passed to the TabInto implementation.