I have a form with address data on it. The user can search a specific address by a search form. When the user found the address he wants he dubbleclicks the address. The (search) form will close and the data will be shown in a form in which he can edit the address. So at the moment he or she clicks the "Change"-button. That specific record must be locked. So nobody else can change that data while this first user is changing the address.

I will try the code you have send to me.

Ron