COM Objects: Runtime Callable Wrappers

A Runtime Callable Wrapper (RCW) is used by the .NET: Common Language Runtime (CLR) to give the impression, that a COM Object is an ordinary .NET object and thus hides the differences between managed and unmanaged code.

Interfaces that are used (if exposed?) by RCW when wrapping a COM Object are:

• IUnknown
• IDispatch
• IErrorInfo
• IProvideClassInfo
• IConnectionPoint and IConnectionPointContainer (optionally)
• IDispatchEx (optionally)
• IEnumVARIANT