Vista - How to intercept a Win32 Message in WPF App?

I´m trying to intercept a Win32 Message (WM_TIMECHANGE) in my WPF
Application. In Windows Forms this is a simple task, but I didn´t found how
can I do to receive a Win32 Message in WPF.

My question is: How can I do to intercept "natively" a Win32 Message in WPF
Application (via code and/or XAML) ? Is possible (it means without any kind
of interop or host form) ?

Thanks in advanced,

--
Fabio Galuppo
fabiogaluppo.blogspot.com

No, there's no "native" WPF API for that. Not every window message has a
WPF equivalent -- there's a lot of window messages that have nothing to do
with presentation and UI. Often you can use Winforms's
System.Windows.Forms.SystemInformation class, although I don't remember if
wm_timechange is part of SystemInformation.

Of course, as you suggested, you can also use wndprocs and/or
HwndSource.AddHook.

--
-Nick Kramer [MSFT]
http://blogs.msdn.com/nickkramer

This posting is provided "AS IS" with no warranties, and confers no rights.
Use of included script samples are subject to the terms specified at
http://www.microsoft.com/info/cpyright.htm

"Fabio Galuppo" <FabioGaluppo@discussions.microsoft.com> wrote in message
news:7104AA85-36B4-49F8-BBF5-8C3C19E9D765@microsoft.com...
> I´m trying to intercept a Win32 Message (WM_TIMECHANGE) in my WPF
> Application. In Windows Forms this is a simple task, but I didn´t found
> how
> can I do to receive a Win32 Message in WPF.
>
> My question is: How can I do to intercept "natively" a Win32 Message in
> WPF
> Application (via code and/or XAML) ? Is possible (it means without any
> kind
> of interop or host form) ?
>
> Thanks in advanced,
>
> --
> Fabio Galuppo
> fabiogaluppo.blogspot.com

Hello Nick,

Thanks for this information!

However, I hope in the "future" releases of WPF somekind of support to
receive these system messages. We have a lot of system messages that Windows
OS notifies an application (WM_TIMECHANGE, WM_POWER, WM_DEVICECHANGE to name
a few) and I don´t see the need to use classes from System.Windows.Interop to
receive a system message.

I understand this kind of feature must be Windows only (perhaps not
supported in WPF/E). However, suppose that I´m writing a "Battery Control UI"
app, I can do these only with Windows Forms (with MDX) or Win32 (with
DirectX), but I can´t with WPF without Interop AND hosting a control .

Thanks again,

--
Fabio Galuppo
fabiogaluppo.blogspot.com


"Nick Kramer [MSFT]" wrote:

> No, there's no "native" WPF API for that. Not every window message has a
> WPF equivalent -- there's a lot of window messages that have nothing to do
> with presentation and UI. Often you can use Winforms's
> System.Windows.Forms.SystemInformation class, although I don't remember if
> wm_timechange is part of SystemInformation.
>
> Of course, as you suggested, you can also use wndprocs and/or
> HwndSource.AddHook.
>
> --
> -Nick Kramer [MSFT]
> http://blogs.msdn.com/nickkramer
>
> This posting is provided "AS IS" with no warranties, and confers no rights.
> Use of included script samples are subject to the terms specified at
> http://www.microsoft.com/info/cpyright.htm
>
> "Fabio Galuppo" <FabioGaluppo@discussions.microsoft.com> wrote in message
> news:7104AA85-36B4-49F8-BBF5-8C3C19E9D765@microsoft.com...
> > I´m trying to intercept a Win32 Message (WM_TIMECHANGE) in my WPF
> > Application. In Windows Forms this is a simple task, but I didn´t found
> > how
> > can I do to receive a Win32 Message in WPF.
> >
> > My question is: How can I do to intercept "natively" a Win32 Message in
> > WPF
> > Application (via code and/or XAML) ? Is possible (it means without any
> > kind
> > of interop or host form) ?
> >
> > Thanks in advanced,
> >
> > --
> > Fabio Galuppo
> > fabiogaluppo.blogspot.com
>
>
>

How did you resolve the problem as WPF uses <Window> element instead of Form?
Available articles out there only show how to intercept using WinForm. I have
the same problem and am stuck. Appreciate that you will share your experience
on this issue.

"Fabio Galuppo" wrote: