.NET and COM Interoperability Handbook, The

Object Life-Cycle Implications

When you are using a managed code object from a COM/Win32 client, you face a mismatch between the life-cycle scheme that the client uses and expects and the life cycle that the underlying object uses. As you already learned in Chapter 6, the CCW exposes a managed object to unmanaged consumers so that it appears for all intents and purposes to be like any other COM object. The CCW synthesizes an implementation of system-level interfaces like IUnknown, IDispatch, and ISupportsErrorInfo. The CCW exposes COM equivalents of any managed interfaces that the managed class supports, and it may also expose a class interface that exposes all of the public methods implemented by the class. All of these interfaces exposed by ...