Defining COM interfaces without IDL

[Felix Nawothnig]

Hi.

The PSDK headers sometimes use IDL to define an interface, sometimes 
it's done by hand (or rather using macros). I don't know if there is any 
reason for that (someone in the channel said it's just sloppiness by MS) 
- so, are there any resulting differences regarding source compatibility 
or can we just use IDL even if MS didn't?

Felix