Thanks. The grid/subgrid or master/detail option is very intriguing, and one that I hadn't explored at all. In this case, the reason the user enters a project number as text (rather than selecting from a list) is because there are hundreds of projects in the database, and we're trying to keep the form as simple and compact as possible (plus they'd like it to look somewhat like the old MS Jet database one we're replacing). So when they enter a project number, it's is looked up in the database and an english name is shown to the user, and then the rest of the line knows which project ID to assign the work times to when writing to the database. It seems convoluted to me, but I'm struggling with finding the simpler solution that must be out there. So far I can see the subgrid as simplifying this, but I'll keep pondering throughout the day.

Thanks again. Your suggestions get me thinking in different directions, which is exactly what I need!