UnhandledExceptionHandler only handles Exceptions on Methods with Return type?

I’m noticing that if I register an UnhandledExceptionHandler via:

ExcelIntegration.RegisterUnhandledExceptionHandler(ErrorHandler);

and an exception occurs within my ExcelFunction-marked method the handler does not trigger unless the return type is not void.

Is this intentional, or a bug?

[govert]

The exception handler gets woven into the IL method stub, which is not code I’m likely to fiddle with at this stage.

I think I didn’t make it an event since it needs to return the overridden result of the function. (I guess the event signature could have an out or ref parameter for that purpose, but maybe that didn’t occur to me at the time.)

I’m not likely to make any changes to this aspect of Excel-DNA except improved documentation.

[robodude666]

Might be better to provide documentation in intellisense (and elsewhere) that highlights this expected behavior. You can still have a void function; not everyone is familiar with Visual Basic’s version of Function vs Sub.

Is there a technical limitation on why it can’t handle exceptions from void?