Returns an interface pointer that represents an interface for an object.

返回一个接口指针，该接口指针表示对象的接口。

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Clients of COM objects discover whether a service is available by requesting an interface that provides that service and getting back an interface pointer, or not.

COM对象的客户端通过对提供服务的接口发出请求并取回接口指针来发现服务是否可用。

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The new interface allows users to speak commands to the iTV rather than scroll through hundreds of programs using a pointer.

FORBES: Apple Partners To Subsidize iTVs; Sharp To Produce Sets