Re: Installing a Service DLL?

From:

"Igor Tandetnik" <itandetnik@mvps.org>

Newsgroups:

microsoft.public.vc.language

Date:

Tue, 14 Apr 2009 16:53:46 -0400

Message-ID:

<eX#8bMUvJHA.1164@TK2MSFTNGP03.phx.gbl>

Vincent Fatica <vince@blackholespam.net> wrote:

Thanks, Igor. I got it installed and I can start/stop it. But it's
not doing what it should. The DLL starts (and waits for) a thread;
the thread installs a global WH_MOUSE_LL hook and goes into message
pump. All goes OK according to debug logs. The hook is set but it's
never called.

I never used WH_MOUSE_LL specifically, but normally hooks are only
global within a single desktop. Services run in their own window station
on their own desktop, separate from those of interactive user. So
there's nobody there to move the mouse.

Should I expect a WH_MOUSE_LL hook set by an app
(service) run by LocalService to see mouse events generated by a
logged-on user?

I don't know, but somehow I doubt it. What if there is more than one
logged-on user (as is possible with Terminal Server or with Media Center
Extender)?
--
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