Re: IServiceProvider->QueryService() returns 80040154-class not regist

From:

"Scot T Brennecke" <ScotB@MVPs.spamhater.org>

Newsgroups:

microsoft.public.platformsdk.shell,microsoft.public.vc.atl,microsoft.public.win32.programmer.ole,microsoft.public.vstudio.extensibility

Date:

Mon, 25 May 2009 03:31:07 -0500

Message-ID:

<OzfunMR3JHA.6004@TK2MSFTNGP02.phx.gbl>

Is your application actually compiled as an x64 binary, or is it a 32-bit app that runs in WOW? You
can't have the same COM application be both 32-bit and 64-bit.
On 64-bit machines, you need to be aware of the registry reflection and redirection concepts:

Registry changes in x64-based versions of Windows Server 2003 and in Windows XP Professional x64
Edition:
http://support.microsoft.com/kb/896459

"Pradeep" <Pradeep@discussions.microsoft.com> wrote in message
news:FCB802D4-6E96-4C5A-80A1-F6FBC8A52035@microsoft.com...

Hi,
My application which runs on 64bit XP fails at QueryService with error
80040154 - class not registered, it works properly on a 32bit XP.
I could see the GUID existing in registry of 32bit system but not in the
64bit system.
The refguid below refers to 'SApplicationObject Service'.
.....
const GUID refguid = {0x0c539790, 0x12e4, 0x11cf, 0xb6, 0x61,0x00, 0xaa,
0x00, 0x4c, 0xd6, 0xd8};
HRESULT hresult = pServProv->QueryService(refguid, IID_ISimpleDOMNode,
void**)&pNode);
......
During installation I install VC++ 2005 redistributable(x64) along with my
application.
My question is how do I register the required Interface class (i am aware of
regsvr32) and where does it exists, and how all this works in 32bit XP and
not in 64bit?
Any help/pointers would be greatly appreciated.

Thank You,
Pradeep