您可以使用MoveFocus进行操作，如本MSDN文章中所述，该文章解释了有关焦点的所有内容:

You do that using MoveFocus as shown in this MSDN article which explains everything about focus: Focus Overview.

这里有一些示例代码可以到达下一个重点关注的元素(从那篇文章中得到，稍作修改).

Here is some sample code to get to the next focused element (got it from that article, slightly modified).

// MoveFocus takes a TraversalRequest as its argument.
TraversalRequest request = new TraversalRequest(FocusNavigationDirection.Next);

// Gets the element with keyboard focus.
UIElement elementWithFocus = Keyboard.FocusedElement as UIElement;

// Change keyboard focus.
if (elementWithFocus != null) 
{
    elementWithFocus.MoveFocus(request);
}