COM knows how to Marshall IUnknown, and when asked for a different interface, it looks under this key, finds the CLSID of the object that handles marshalling, and starts using it.
COM知道怎样编组IUnknow，且当请求不同的接口时，它会检查这个键，找到处理编组的CLSID，接着开始使用它。
COM knows how to Marshall IUnknown, and when asked for a different interface, it looks under this key, finds the CLSID of the object that handles marshalling, and starts using it.
COM知道怎样编组IUnknow，且当请求不同的接口时，它会检查这个键，找到处理编组的CLSID，接着开始使用它。
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