[Closed] Doubt creating buttons inside a rollout

Ok, i want to have a dialog, i know how to create it, inside it i want to have 3 lists to do a lot of things, but the one i’m asking for is the next:

I want to create a rollout (or some buttons inside a predefined rollout) when i click in select a memeber of the array in one of the lists, i know how to write some reaction to the selection of the member of the array, but i don’t know how to insert a predefined rollout inside a dialog (or some buttons)

All predefined, not dinamyc, i still don’t understand very well dynamic content.

Cheers!