Hi Jorge,

>I would like to add a checkbox in the grid for the user to select the items he wants from the list and store the respective code for each item in a different table. Also I would like the check to be active if the user has previously selected that item.

I'm not positive I understand exactly what you are asking but: I would add a logical field to your table, add the grid column for that field, put a checkbox in it, and in hte checkboxes interactive change do what you want ("store the resapective code").