Hi Grant,

Thanks for your support for Microsoft and VS 2005.

In VB.NET, when an applicatin encounters an unhandled exception, it raises
the UnhandledException event. However, the Visual Basic compiler prevents
applications that are built for debugging from raising this event, to allow
a debugger to handle the unhandled exceptions. This means that if you are
testing your application by running it under the VS IDE debugger, your
UnhandledException event handler will not be called.

This behavior has nothing to do with the
Application.SetUnhandledExceptionMode method.

What's more,  Application.SetUnhandledExceptionMode method must be called
before you instantiate  the main form of your application. That's to say,
if you are going to call this method, you must call it in a Sub Main
startup and before the Applicaiton.Run code(you couldn't call this method
in the Application's Startup event handler). However, it means that you
have to disable application framework and select Sub Main as the Startup
object, which conflicts with the Visual Basic Application Model that
UnhandledException event requires.

Hope this helps.
If you have any concerns, please feel free to let me know.

Sincerely,
Linda Liu
Microsoft Online Community Support

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