COM的客户程序通过获取指向一个对象接口的一个指针，并通过该指针来调用方法以实现与COM对象之间的互相作用，就好像对象驻留在客户程序的地址空间中一样。

A COM client interacts with a COM object by acquiring a pointer to one of the object's interfaces and invoking methods through that pointer, as if the object resides in the client's address space.

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