use matrix

hi,

i'm working with ScreenPainter

i have a matrix , in this matrix there is a few colums (@SIR_LOTL)

In this matrix , i have a colum in other file (@SIR_COMPOSANT) , it's for a description

When i use this matrix , i open a chooseList and i select a code (@SIR_COMPOSANT)

1) how to make to return a descrition of (@SIR_COMPOSANT) in my matrix

2) when i open a form with this , i want see the code of ((@SIR_LOTL) and à description of ((@SIR_COMPOSANT)

automaticly

i don't know do that

thank you

Didier