I have a Master/Detail grid setup, each pulls data from a different table with a common key. The master grid contains a unique “user_id” value for each row.

How do I pass this “user_id” value from the selected row of the master grid AUTOMATICALLY when I'm adding a record to the detail grid?

I don't want to have to add the same “user_id” each time a record is added to the detail grid… it should be automatically entered according to the row they've selected in the Master Grid.