Hi Philippe,
The ListBox in the current shipping version of DBKit cannot automatically display values from related tables. However, the ListBox in the version that is under development can. I am hoping to have it available sometime in January. It has a LOT of new capabilities and is even easier to use.
While this forum is frequented by full-time professional developers it is also equally the home of those new to Xojo, new to programming and those that have programming experience but don’t do it full-time. All are absolutely welcome.