Initializes a newly created proxy and returns an interface pointer to that proxy.
Pointer to the stream from which the interface pointer is to be unmarshaled.
Reference to the identifier of the interface to be unmarshaled.
When this operation completes, the address of a pointer variable that receives the interface pointer requested in riid. If this operation is successful, *ppv contains the requested interface pointer of the interface to be unmarshaled.
S_OK if successful; otherwise, E_NOINTERFACE or E_FAIL.