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.
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