Can't handle row selection

[davcam]

Hi, I'm new to prestashop development and I need to create a module integration.
After looking to the examples, especially AdminOrdersController, I can do what i want, that is to show a table like the Order's table and do a custom action on Export click.
Unfortunatly I can't undestand how to handle rows selection. Is it possible to do It?
If i try to export selected orders prestashop export all orders in table.

Thanks for the help

davide