I'm now doing that, binding to the enter method and setting enabled false if conditions aren't met. In the leave method I'm setting enabled true, so I don't have to do anything to manage the enabled state of the control when navigating thru the dataset. This bounces the user to the next enabled control. Seems to work fine.

Thanks for your help and also Christopher's.

I looked at using the ONENTER method, but couldn't find that in the declarations for the control. When I typed it in, I got the error "Event 'ONENTER' cannot be found".

For my future info, how is that method accessed? Is it used in subclassing only?