/// <summary> /// Constructor /// </summary> /// <param name="outerObject">The object that needs interface requests filtered</param> /// <param name="queryForType">determines whether we call QueryInterface for the interface or not</param> /// <remarks>if the passed in outerObject is known to point to the correct vtable for the interface, then queryForType can be false</remarks> /// <returns>if outerObject is IntPtr.Zero, then a null wrapper, else an aggregated wrapper</returns> public RestrictComInterfaceByAggregation(IntPtr outerObject, bool queryForType = true) { if (queryForType) { var iid = typeof(T).GUID; if (ComHelper.HRESULT_FAILED(RdMarshal.QueryInterface(outerObject, ref iid, out _outerObject))) { // allow null wrapping here return; } } else { _outerObject = outerObject; RdMarshal.AddRef(_outerObject); } var clrAggregator = RdMarshal.CreateAggregatedObject(_outerObject, this); WrappedObject = (T)RdMarshal.GetObjectForIUnknown(clrAggregator); // when this CCW object gets released, it will free the aggObjInner (well, after GC) RdMarshal.Release(clrAggregator); // _wrappedObject holds a reference to this now }