ChangeWindowMessageFilter: what does this really do??

I'll get it now. thanks for the link!
--
Thanks so much,

george

_________________________
George S. Lockwood
Lead Client Developer
peoplePC, an EarthLink company



"Jimmy Brush" wrote:

> Hello,
>
> Have you installed the Windows SDK for Windows Vista and updated your Visual
> Studio to reference the new SDK?
>
> http://www.microsoft.com/downloads/d...displaylang=en
>
> --
> - JB
>
> Windows Vista Support Faq
> http://www.jimmah.com/vista/
>

I forgot to answer your first question ...

> I believe I have the situation where a "low" privileged app
> is sending windows messages to an IE7 in protected mode
> and thereby the messages are not allowed to pass thru.

Vista prohibits applications of different integrity levels from sending most
windows messages between each other. IE in protected mode runs in LOW
integrity; normal applications run in MEDIUM; and programs running with
administrator privileges run as HIGH. (There is also a SYSTEM level for some
system services).

ChangeWindowMessageFilter allows an application in a higher integrity level
to specify additional windows messages that it wants to accept from
applications running in a lower privilege level.

For example, if you run say NOTEPAD.exe, it will have a MEDIUM integirty
level. If you then run an administrative application, let's use task
scheduler as an example, it will run with HIGH integrity level.

notepad is isolated from task scheduler because they are running in
different integrity levels; the system prevents notepad from sending task
scheduler most window messages, prevents it from injecting code into task
scheduler via hooks, prevents it from writing into its process memory, etc,
etc, because of the difference in integrity level.

The ChangeWindowMessageFilter api can be used in this example by task
scheduler to allow it to receive additional window messages from notepad.

--
- JB

Windows Vista Support Faq
http://www.jimmah.com/vista/

I downloaded the new SDK and installed it.

To make things easier, I just got the definition of
ChangeWindowMessageFilter from its file in the new "v6.0" include file.

I then copied the User32.lib from the "v6.0" lib dir into my project's dir.

and I'm getting a link error (unresolved external).

So apparently it is not found in User32.lib ??

Is there a reason I cannot build this on a WinXP SP2 system?



--
Thanks so much,

george

_________________________
George S. Lockwood
Lead Client Developer
peoplePC, an EarthLink company



"GSLockwood (IUnknown)" wrote:

> I'll get it now. thanks for the link!
> --
> Thanks so much,
>
> george
>
> _________________________
> George S. Lockwood
> Lead Client Developer
> peoplePC, an EarthLink company
>
>
>
> "Jimmy Brush" wrote:
>

> > Hello,
> >
> > Have you installed the Windows SDK for Windows Vista and updated your Visual
> > Studio to reference the new SDK?
> >
> > http://www.microsoft.com/downloads/d...displaylang=en
> >
> > --
> > - JB
> >
> > Windows Vista Support Faq
> > http://www.jimmah.com/vista/
> >

It should compile fine on XP. I don't think the linker looks inside your
project's dir for lib files by default. Try telling the linker the exact
location of the lib file (path and filename) using the project's settings.


--
- JB

Windows Vista Support Faq
http://www.jimmah.com/vista/

Actually I have (".\User32.lib")

--
Thanks so much,

george

_________________________
George S. Lockwood
Lead Client Developer
peoplePC, an EarthLink company



"Jimmy Brush" wrote:

> It should compile fine on XP. I don't think the linker looks inside your
> project's dir for lib files by default. Try telling the linker the exact
> location of the lib file (path and filename) using the project's settings.
>
>
> --
> - JB
>
> Windows Vista Support Faq
> http://www.jimmah.com/vista/
>