一旦理解了系统是如何工作之后，创建火，烟雾，喷泉之类的效果将会是小菜一碟。
Once you understand how particle engines work, creating effects such as fire, smoke, water fountains and more will be a piece of cake!
该消息将被派遣到在窗口创建线程窗口的程序，即在STA线程和消息处理程序将火COM事件从安全的地方。
The message will be dispatched to the window's procedure on window creation thread, that is on STA thread and the message handler would be a safe place to fire COM event from.
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