>Hi Nadya,
>
>I think part of this whole problem is that I use a cursor as the ControlSource, not the main table. I can't use the main table because it might cause a record sharing conflict or record locking problem with multi-users on the network.
>
>I will try the Lockscreen = .t./.f. idea around the GotFocus code and see what happens. I wish this were better behaved. It's not that difficult of a concept, but making it behave is a bit tricky.

Do you use the same cursor for all controls on the form? Are you sure, this cursor is not closed, then you open another form?

You can use table buffering for working in multi-user environment... I would not tell more, because this problem was discussed here multiple times and it's also described in books, like "Effective Techniques", for example.