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From: kilic on 21 Oct 2009 14:59
How can I detect when a PnP is inserted and removed. Is there a way to catch
this events in C#.
I would appreciate if you could provide a code snippet.
thx

From: Ben Voigt [C++ MVP] on 23 Oct 2009 15:06


"kilic" <u55638(a)uwe> wrote in message news:9defaca64e4e9(a)uwe...
> How can I detect when a PnP is inserted and removed. Is there a way to
> catch
> this events in C#.
> I would appreciate if you could provide a code snippet.
> thx
>

RegisterDeviceNotification and SetupDi*

They involve some messy Win32 API structures, so I'd strongly recommend
using C++/CLI to build a .NET component which calls the Win32 APIs, then
your C# code can consume the C++/CLI component.

From: kilic via DotNetMonster.com on 23 Oct 2009 16:20
Thanks Ben,

I found an example using
protected override void WndProc(ref Message m)
{
if (m.Msg == WM_DEVICECHANGE)
....
the only issue I have now is that I don't get
dbch_devicetype==DBT_DEVTYP_DEVICEINTERFACE, when I receive the
WM_DEVICECHANGE message.

I only get the dbch_devicetype == DBT_DEVTYP_PORT and DBT_DEVTYP_VOLUME..

I think I need to do use the RegisterDeviceNotification to get the
DBT_DEVTYP_DEVICEINTERFACE, type.

Do you have a simple code snippet example with RegisterDeviceNotification in
C#, which you can post?

Thanks,


Ben Voigt [C++ MVP] wrote:
>> How can I detect when a PnP is inserted and removed. Is there a way to
>> catch
>> this events in C#.
>> I would appreciate if you could provide a code snippet.
>> thx
>
>RegisterDeviceNotification and SetupDi*
>
>They involve some messy Win32 API structures, so I'd strongly recommend
>using C++/CLI to build a .NET component which calls the Win32 APIs, then
>your C# code can consume the C++/CLI component.

--
Message posted via DotNetMonster.com
http://www.dotnetmonster.com/Uwe/Forums.aspx/dotnet-csharp/200910/1

From: Ben Voigt [C++ MVP] on 26 Oct 2009 18:29
"kilic via DotNetMonster.com" <u55638(a)uwe> wrote in message
news:9e09871826252(a)uwe...
> Thanks Ben,
>
> I found an example using
> protected override void WndProc(ref Message m)
> {
> if (m.Msg == WM_DEVICECHANGE)
> ...
> the only issue I have now is that I don't get
> dbch_devicetype==DBT_DEVTYP_DEVICEINTERFACE, when I receive the
> WM_DEVICECHANGE message.
>
> I only get the dbch_devicetype == DBT_DEVTYP_PORT and DBT_DEVTYP_VOLUME..

Right. Windows doesn't send DBT_DEVTYP_DEVICEINTERFACE notifications unless
you request them, because there are so many and most programs wouldn't have
any use for them.

>
> I think I need to do use the RegisterDeviceNotification to get the
> DBT_DEVTYP_DEVICEINTERFACE, type.

Also right.

>
> Do you have a simple code snippet example with RegisterDeviceNotification
> in
> C#, which you can post?

I don't. I follow my own advice and use C++/CLI for calling Windows API
functions from .NET

>
> Thanks,
>
>
> Ben Voigt [C++ MVP] wrote:
>>> How can I detect when a PnP is inserted and removed. Is there a way to
>>> catch
>>> this events in C#.
>>> I would appreciate if you could provide a code snippet.
>>> thx
>>
>>RegisterDeviceNotification and SetupDi*
>>
>>They involve some messy Win32 API structures, so I'd strongly recommend
>>using C++/CLI to build a .NET component which calls the Win32 APIs, then
>>your C# code can consume the C++/CLI component.
>
> --
> Message posted via DotNetMonster.com
> http://www.dotnetmonster.com/Uwe/Forums.aspx/dotnet-csharp/200910/1
>
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