Which component gets the initial focus when the application is started?
当应用程序启动时哪个组件得到了初始的焦点呢？
This component is the focus of this article.
此组件是本文的重点。
Determining the opposite component in a focus change.
确定焦点更改中的对立组件。
This will return null only when focus has been set to "no component."
这样，只有当焦点被设置成“无组件（no component）”时才会返回空。
You can use Shift-Tab to shift focus to the previous component in the TAB group.
用Shift -tab将焦点转到tab组的前一个组件。
One central component is the focus of attention.
一个重要组件是关注焦点。
The component should "wrap around" and set focus to its first contained TAB stop.
组件应该“回绕”并将焦点设置到其所包含的第一个制表位。
The component should "wrap around" and set focus to its first contained TAB stop.
组件应该“回绕”并将焦点设置到其所包含的第一个制表位。
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