Hi Harry,

>Thinking that it might be down to my not having specifically included the classlib, I added a line to do that - no effect. (Didn't really think it was that because it was, after all, running the code, so the class must have been visible to the app).

Can you post your code from the valid in the subclassed textbox? when you return .f., what level of the hierarchy is that from? Do you have something like:

return llCondition and dodefualt()

?