[1/3] include: Add COM interface definitions needed for PrintDlgEx implementation.

[Dmitry Timoshkov]

Vincent Povirk <madewokherd at gmail.com> wrote:

> Does PrintDlgEx really use an interface with the same iid but
> different function signatures depending on whether the A or W version
> is called? If so, I think it would be best to define both versions, so
> that our tests and implementation can easily provide/use both.

I think that there is no much choice in Wine, PrintDlgEx implementation
will have to use casts in order to keep compatibility with PSDK headers.

-- 
Dmitry.