IID_IUnknown not defined?

[Christoph Frick]

hiho

i build wine nearly every day from cvs. for the last to days i was not
able to do so as the first occurences of IID_IUnknown and
IID_IClassFactory the compiler thinks they are missing. i can also not
find them via tags-file nor grep **/*.h; is there something wrong on my
end (as i would expect, because no one else is complaining)? anybody any
ideas?