So far I have only developed apps that let users use one form (module) 
at a time. I usually have a central form that lists all the modules for 
the things they can do. They select one, do their thing and then close 
it in order to go back to the central form and choose another module.

When I start dreaming of setting things up so that a user can have more 
than 1 form open at a time the logistics of tbl/record locking is mind 
boggling.

For instance, they could have one form open which has one or more locks 
on some tables in the datamodel of the form. If they opened another form 
that had even one of the tables in the datamodel of the first form then 
there would conflicts with record locking.

How does one get around this? Thank you.

Peter