http://support.microsoft.com/default.aspx?scid=kb;EN-US;q179230WARNING: Internet Explorer will create an instance of each Browser Helper Object listed in the registry every time a new instance of Internet Explorer is started. This means that if you have Active Desktop installed, the Browser Helper Objects will be loaded every time you open a new folder as well as when the browser itself is started.
你在CSDN或MSDN搜索一下都有这方面的信息！