Re: CoInitializeEx and MTA

From:

"Igor Tandetnik" <itandetnik@mvps.org>

Newsgroups:

microsoft.public.vc.language

Date:

Tue, 1 Jul 2008 00:53:55 -0400

Message-ID:

<#B2x8Zz2IHA.2104@TK2MSFTNGP03.phx.gbl>

"George" <George@discussions.microsoft.com> wrote in message
news:165B66C4-BDD8-41E8-A94B-BA7B85800F34@microsoft.com

There are per-thread resources, too. CoUninitialize in a thread frees
resources allocated for this thread when it leaves MTA apartment.

I am confused. In point 1 of the question, you think it is correct
that no resource is allocated from the 2nd call to CoInitializeEx.

I meant second call on the same thread. It either fails, or returns
S_FALSE and does nothing (except incrementing some internal counter).

Every thread that wants to use COM must call CoInitialize[Ex]. The first
such call (the first for the calling thread, not for the apartment or
for the process) returns S_OK and allocates per-thread resources.
--
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