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Detecting PC inactivity
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Ben (VIP)
Hi All,

I need to detect when the PC has been inactive for a set period of time.
This solution has to work on Windows 98 and up. I was looking for a way to
hook into global mouse and keyboard events, but I haven't found a way to do
it.

The IMessageFilter appears to only work at the Application level. Similarly
using SetWindowsHookEx with WH_MOUSE only listens at the application level,
and WH_MOUSE_LL isn't supported by Windows 98/ME.

Anyone have a solution to this?

Thanks,
Ben
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Imran Koradia (VIP)
take a look at these:
http://www.codeproject.com/csharp/GlobalSystemHook.asp
http://www.codeproject.com/csharp/globalhook.asp

hope that helps..
Imran.

"Ben" <Click here to reveal e-mail address> wrote in message
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Herfried K. Wagner [MVP] (VIP)
* "Imran Koradia" <Click here to reveal e-mail address> scripsit:
[Original message clipped]

In addition to that:

Managing Low-Level Keyboard Hooks in VB .NET
<URL:http://www.developer.com/net/net/article.php/11087_2193301_1/>

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>
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Ben (VIP)
The first link (http://www.codeproject.com/csharp/GlobalSystemHook.asp)
proposes a solution that requires a c++ implementation to be called into c#,
and maybe this is the only way to do it, but it would be much nicer if there
was an entirely c# implementation.

The other links propose solutions that requires hooking
WH_KEYBOARD_LL/WH_MOUSE_LL, which microsoft
(http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookfunctions/setwindowshookex.asp) indicates are only available on NT/2000/XP.

Does anyone else have a c# solution that will work on 98, ME, 2000, and XP?

--Ben

"Herfried K. Wagner [MVP]" wrote:

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Imran Koradia (VIP)
As per this message:
http://tinyurl.com/6syna

I don't think you can have a completely managed solution to implementing
hooks that would work on windows 98/ME as well. You would most likely have
to resort to a language that allows you to create standard dlls (which would
exclude VB6 as well) such as C, C++, etc

Sorry - I know this isn't what you were expecting. Anyway, hope this helps a
bit..
Imran.

"Ben" <Click here to reveal e-mail address> wrote in message
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[Original message clipped]

i/windowsuserinterface/windowing/hooks/hookreference/hookfunctions/setwindow
shookex.asp) indicates are only available on NT/2000/XP.
[Original message clipped]
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Ben (VIP)
Thank you very much for your help Imran.

Writing a custom unmanaged dll was the only I had found to do it in my
googling, but I was hoping against hope that someone on the boards had a nice
way of doing it.

Thanks again,
--Ben

"Imran Koradia" wrote:

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System.Windows.Forms.IMessageFilter




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