C# app doesn't work properly in windows 7

Question

I'm working with a C# sample application (taken from here : http://www.piccoder.co.uk/content/view/42/26/1/4/) The sample app and the source code are available in the .zip file. When I run the app in Windows XP, it is working correctly. But the same app, when I run in Windows 7, it is not working correctly. You can try run the WindowsApplication3.exe file in the /bin directory, and try to do the addition of two number there. The result will always be zero (in windows 7)

I've been using Visual Studio 2008 (in my Windows 7 machine) to modify and build the source code, and run the output app in Windows XP machine for testing purposes. I hope I can test it on Windows 7 machine directly. Can someone take a look at the source code and guide me if there were anything to be modified or added since this sample source code is quite an old code.

Thank you!

Answer 1

The problem most probably has nothing to do with C# or the .Net framework. It's likely a failure in the communication with the USB driver. The drivers model has changed drastically between XP and Vista/Win7 and the USB wrapper library most likely assumes the XP driver model.