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How to handle events raised from a kernel-level driver written in C++ from C# code

Posted Date Unknown Deepak Joy 5 Comments

I've two parts in my project. One is a kernel mode driver written in C++ and the other is Windows application written in C#. I've raised an event from the C++ kernel mode driver and I need to handle that event from my C# application. If I was coding in C++ I could use the following function

DWORD WINAPI WaitForSingleObject(

  __in  HANDLE hHandle,
  __in  DWORD dwMilliseconds
);

Is there an alternative to this function in C# ?

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thomas_tom99

Posted on: 16/05/2012

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Hello,

I think there is no equivalent library in C#.NET and you need to directly call this win32 API in C#.NET using pInvoke calls..

See some interesting discussions below..

http://www.codeproject.com/Messages/1889585/WaitForSingleObject-equivalent-in- Csharp.aspx

http://www.pinvoke.net/default.aspx/kernel32.waitforsingleobject

Also see the thread below..

http://msdn.microsoft.com/en- us/library/ms173179%28v=vs.80%29.aspx

In principle it should do the same function as WaitforSingleObject, but dont know whether we can trap the same event message coming form the Driver as the method which this C#.NET wrapper library is expecting might be a different win32 API..

Tom

thomas_tom99

Posted on: 16/05/2012

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click on the link below for easy navigation other wise you need to copy and paste the links..

http://www.codeproject.com/Messages/1889585/WaitForSingleObject- equivalent-in-Csharp.aspx

http://www.pinvoke.net/default.aspx/kernel32.waitforsingleobject

http://msdn.microsoft.com/en-us/library/ms173179%28v=vs.80%29.aspx

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bprado

Posted on: 20/05/2012

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Hi,

I think your solution is to use PInvoke as says Tom, but I think you need to write a DLL to wrap your kernel-mode driver event and expose it. Then you can manage this DLL event through you C# app with PInvoke as managed applications can not directly connect to kernel drivers.

bprado

Posted on: 20/05/2012

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You also can handle the gap between managed and unmanaged code manually, using your own marshalers and everything you need to handle this, but I also suggested use PInvoke if you can.

Take a look at this great article: Accessing Device Drivers from C#

- Borja

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thomas_tom99

Posted on: 20/05/2012

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Adding to Borjas point , you can use C++/CLI to get the best out of Unmanaged as well as Managed code. For example you can use WaitForSingleObject Unmanaged API as well as .NET managed library if you use Managed C++ without much difficulty with marshaller etc ..

Tom

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