键盘焦点的概念与使用中视窗的概念相关。
The concept of keyboard focus is related to that of an active window.
使用中视窗是使用者在其中作业的前景视窗。
An active window is the foreground window in which the user is working.
当呼叫这个版本时，目前使用中视窗变成对话方块的拥有人。
When this version is called, the currently active window is made the owner of the dialog box.
具有键盘焦点的物件不是使用中视窗就是使用中视窗的子物件。
The object with the keyboard focus is either the active window or a child object of the active window.
您可能没有使用中视窗的控制代码或参考，或者甚至不了解哪些视窗在指定的时间是使用中的。
You might not have a handle or a reference to the active window, or even know which window is active at a given moment.
您可能没有使用中视窗的控制代码或参考，或者甚至不了解哪些视窗在指定的时间是使用中的。
You might not have a handle or a reference to the active window, or even know which window is active at a given moment.
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