Re: Connection Point for interfaces

"Andrey" <andrej@telemed.lt> wrote in message
news:%23iG4ZyAcGHA.3908@TK2MSFTNGP02.phx.gbl


ListChanged is simply a property whose value happens to be a delegate.
In COM terms, you could represent it as a pair of methods taking a
callback interface:

interface IListChangedEventHandler : IUnknown {
    HRESULT OnEvent([in] IUnknown* sender);
};

interface IBindingList : IUnknown {
    HRESULT Advise([in] IListChangedEventHandler*);
    HRESULT Unadvise([in] IListChangedEventHandler*);
};

In this sense, an interface can "support" "events", though in COM this
technique is usually referred to as a callback, not an event. The term
"events" usually means those fired via IConne?tionPoint.
--
With best wishes,
    Igor Tandetnik

With sufficient thrust, pigs fly just fine. However, this is not
necessarily a good idea. It is hard to be sure where they are going to
land, and it could be dangerous sitting under them as they fly
overhead. -- RFC 1925