Re: which classes support aggregation?

[Robert Shearman]

James Hawkins wrote:
> IClassFactory->CreateInstance aggregation check: 
> "The CreateInstance method of IClassFactory takes pUnkOuter as the
> second member. This parameter must be null unless the class supports
> aggregation, which many don't."
>
> Where can I find out which classes support aggregation?

Generally, most classes don't bother with aggregation as it is only 
something that OLE geeks get excited over. There are a few classes in 
ole32 that support aggregation and it is specified as so in MSDN. So, 
unless tests or MSDN say otherwise, just assume that a class doesn't 
support aggregation.

Rob