As you know, a Windows shell extension is a COM in-process server that Windows Explorer loads when it is about to perform a certain action on a document-for example, displaying its context menu.

我们知道，一个Windows外壳扩展即是一个进程内的COM服务器，它在Windows资源管理器执行某种动作时装入内存——如显示上下文菜单。

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