I am attempting to write two functions that add and remove a folder from a IShellLibrary. I started with this, but the function produces an exception in System._IntfClear: First chance exceptio...

Summary After declaring an array for some object type where the type doesn't use an interface that derives from COM's IDispatch interface (& so isn't properly set-up to enable [OLE] Automation...

I want to add a feature to my classes so I can use them in for-each loops. I wrote hashmaps, arraylists, queues, sets and so on that I want to iterate over. Now I'm looking for a way to implement ...

I've been looking for an example of how to implement IUnknown in C#, but haven't found any decent references or solutions to this. Should it be as simple as... public interface IUnknown { UInt32...

If I have an IUnknown *ptr, do I need to call Release() on every interface I obtain through ptr->QueryInterface(), in addition to calling ptr->Release() when I'm done with ptr? I used to thi...

Despite years of Delphi programming I just ran into a class declaration style I had never seen for a class that supports IUnknown: TBCUnknown = class(TBCBaseObject, IUnKnown) private FRefCount: i...

Sorry if this question seems obvious for everyone, but I am very new to COM. From the tutorial I see here http://www.codeguru.com/cpp/com-tech/activex/tutorials/article.php/c5567, it seems like eve...

Every time I build my C# Solution, I get a handful of warnings about interfaces that I've never seen or written. I tried Googling for some of them, but get no hits. Could these possibly be buried i...

In Delphi, IUnknown is declared as: function QueryInterface(const IID: TGUID; out Obj): HResult; stdcall; Note: The output parameter is untyped In my TInterfacedObject descendant i need to hand...