Is there a way to call a C# delegate from COM Interop?

I'm porting a C# library to COM and I'm having a hard time trying to translate some delegates. The C# library works with some callbacks (using delegates). Usually I would translate that to events to be consumed by COM clients but the library only makes public Interfaces so I can not use the ComSourceInterfaces.

As an example of what I would like to be able to do:

[ComVisible(false)]
public delegate void ReceivedCOMMessageHandler (MessageCOM^ message);

[ComSourceInterfaces("ReceivedMessageEventInterface")]
public interface class IChannelCOM
{
    bool PushMessage (MessageCOM^ message);
    bool RegisterEventHandler (ReceivedCOMMessageHandler^ handler, FilterCOM^ filter);
    bool UnRegisterEventHandler (ReceivedCOMMessageHandler^ handler);
    property String^ Name;
    event ReceivedCOMMessageHandler^ ReceivedMessage;
};

[InterfaceType(ComInterfaceType::InterfaceIsIDispatch)]
[Guid("D4D2A638-303E-41d4-8925-07A2A60B17F3")]
public interface class ReceivedMessageEventInterface
{
    [DispId(1)] void ReceivedMessage(MessageCOM^ message);
};

I can't do this because the event is declared on a interface and the ComSourceInterface can only be declared in a class.

Any hints on what can I do to solve this problem?

EDIT: Another way of saying the same. Is there a way to declare events in interf开发者_JAVA百科aces rather than in classes in COM?

Thanks in advance.

As far as I've seen there is no way of doing that other than with Events and Events can only be thrown from a Class never from an Interface.