Re: IEnumCLSID / EnumClassesOfCategories / count

Hmm. Is there any way to find out how many objects are covered by an
enumerator (specifically IEnumCLSID in the context of
EnumClassesOfCategories)?

I'd like to avoid having to reallocate an array which will contain
something for each object returned by the enumerator; would rather
allocate it once after I know the # of objects covered.

Is IEnumCLSID guaranteed to have a fixed # of objects once you call
EnumClassesOfCategories? Or is it a "live" enumerator? (e.g. you run
through the enumerator; it returns 18 items but while you're doing so,
someone registers a new CLSID in the category, and the next time you
get 19 items) And does IEnumCLSID::Skip() either skip the requested #
of items or skip 0 items? (e.g. if you get S_FALSE, will it skip 0
items or skip some indeterminate # of items & then you don't know how
many you've skipped?)

If the # of items is fixed, you could always call Skip(1) until you get
S_FALSE, then you know the # of items, allocate space for them, and
Reset() and go back through them again (And if you knew that S_FALSE
means the enumerator skips 0 items, then you could play games w/
binary-style searches to minimize the number of function calls, to get
the item count)

Of course this would be a heck of a lot easier if there were a Count()
method :(