Table field update
I have two tables, one is Customer and one Estimate.
I open a form that I see the customers and need to update or add new estimate.
My P KEY is MainContactNumber.
When I launch the AddEstimate Form from specific Customer Form details, all the data I entered is updated into the Estimate table but the MainContactNumber.
How can I get this field to update since it is the one that relates between the two tables???