Why is it that when i implemented this code it works differently than the sample app? I like the idea of being able to trap the focus in the control until the error is fixed. It appears as though your sample app disables the other rows in the column until the validation is satisfied because when you click in another coulmn the control is destroyed and focus is changed.

Is there more code doing this functionality that I see in the sample app than what was presented in the source code? When I ran the code supplied all works but this aforementioned functionality.