这个结构包含了系统处理来自任务栏状态区域的消息时所需要的信息。
Contains information that the system needs to process taskbar status area messages.
任务栏状态区域，通常称为系统托盘区，它和任务栏是用户切换应用程序的重要区域。
Taskbars status area, usually called system tray, together with taskbar, is an important area for users to switch application.
任务栏状态区域，通常称为系统托盘区，它和任务栏是用户切换应用程序的重要区域。
Taskbars status area, usually called system tray, together with taskbar, is an important area for users to switch application.
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