Using VBA in Excel 2003.

I've created a userform with a set of dynamic controls (i.e. the combo boxes are created at run time).
I've created a class module to handle events on the combo boxes & this works fine with the _Change event but doesn't work with the _AfterUpdate event.
In examples on the web, the only events that seem to be given are _Change and _Click.

My question is: can I get the _AfterUpdate event to work with these dynamic controls?

I'm happy to post my code if you need it, but as I said it works fine with _Change event, just not _AfterUpdate