From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:4830:134:3::10]:58156)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <paolo.bonzini@gmail.com>) id 1UraaU-0007Q5-8A
	for qemu-devel@nongnu.org; Tue, 25 Jun 2013 17:15:44 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <paolo.bonzini@gmail.com>) id 1UraaT-0001PZ-0l
	for qemu-devel@nongnu.org; Tue, 25 Jun 2013 17:15:42 -0400
Received: from mail-ea0-x235.google.com ([2a00:1450:4013:c01::235]:43640)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <paolo.bonzini@gmail.com>) id 1UraaS-0001PQ-Q4
	for qemu-devel@nongnu.org; Tue, 25 Jun 2013 17:15:40 -0400
Received: by mail-ea0-f181.google.com with SMTP id a15so7197225eae.12
	for <qemu-devel@nongnu.org>; Tue, 25 Jun 2013 14:15:40 -0700 (PDT)
Sender: Paolo Bonzini <paolo.bonzini@gmail.com>
Message-ID: <51CA0874.1000402@redhat.com>
Date: Tue, 25 Jun 2013 23:15:32 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
MIME-Version: 1.0
References: <20130606150618.10486.60669.stgit@hds.com>
	<20130606150645.10486.23215.stgit@hds.com>
In-Reply-To: <20130606150645.10486.23215.stgit@hds.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Subject: Re: [Qemu-devel] [PATCH v4 06/10] qemu-ga: Add Windows VSS provider
 to quiesce applications on fsfreeze
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Tomoki Sekiyama <tomoki.sekiyama@hds.com>
Cc: libaiqing@huawei.com, mdroth@linux.vnet.ibm.com, stefanha@gmail.com, qemu-devel@nongnu.org, lcapitulino@redhat.com, vrozenfe@redhat.com, seiji.aguchi@hds.com, areis@redhat.com

Il 06/06/2013 17:06, Tomoki Sekiyama ha scritto:
> +STDAPI VSSCheckOSVersion(void);
> +
> +STDAPI COMRegister(void);
> +STDAPI COMUnregister(void);
> +
> +STDAPI DllRegisterServer(void);
> +STDAPI DllUnregisterServer(void);

Can you explain the difference between COMRegister/COMUnregister and
DllRegisterServer/DllUnregisterServer (and why the COM+ part need not be
done by regsvr32)?  Also, why does COMUnregister call
DllUnregisterServer but COMRegister does not call DllRegisterServer?

Also, is it needed to call VSSCheckOSVersion from the requestor?  I
would think that checking VSSAPI.DLL is stronger than checking the
version, and indeed you do that check too.

Sorry for the probably stupid questions, COM stuff is way beyond my
Windows knowledge.

Paolo