How to fill a grid at initial start using Web Dynpro

Hello readers(s)

I am having some difficulty using WEB Dynpro.

Last week I installed the Sneak Preview CD and i am trying to learn all about WebDynpro and the J2EE environment.

Until now i succeeded to get a grid filled with data from another SAP System. To get the data i use a RFC function call after pushing a refresh button.

Until now the grid at first start is empty. What i want now is to fill the grid at start without having to use the refresh button.

Where should i put this logic. ?

Bertil Rebergen