Re: What's dispinterface and what's the difference between

"Jenny" <jean.shu@gmail.com> wrote in message
news:1158800214.733066.271490@k70g2000cwa.googlegroups.com


A dispinterface is IDispatch plus a specification of which DISPIDs are
valid, what they mean and what parameters should accompany them in an
Invoke call. To implement a dispinterface means to implement seven
methods of IDispatch, while responding to specific DISPIDs in a specific
way.

An interface derived from IDispatch supports methods in its vtable above
and beyond the seven that are part of IDispatch proper. This arrangement
is typically used for dual interfaces. A dual interface provides access
to the same functionality in two different ways - via IDispatch::Invoke
(late binding) as well as with a direct vtable call (early binding).
--
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