The parent window keeps track of whether the item has child items.
父窗口保留有该项是否包含子项的记录。
The width is the same as the width of the parent window client area.
工具条的宽度与其父窗口的客户区相等。
You have to subclass all child window controls in your parent window.
你必须在你的父窗口中对所有的子窗口控件分类。
Handle to a child window of the parent window specified in EnumChildWindows.
回调函数的句柄指向了子窗口中的句柄。
The result generated by the child window to be returned by the parent window.
子窗口产生的结果，将通过父窗口返回。
The result generated by the child window to be returned by the parent window.
子窗口产生的结果，将通过父窗口返回。
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