multiple selection on a form

thanks to all for your help: sorry, I'm rather new to ars

1) Executing Active Link on a multiple selection
I need to know how it is possible to
execute an active link (a button or a menu item)
that processes ALL the records selected on the form below and NOT ONLY the first record selected, that is actually its default behavior

2) Refresh Tip
Besides I'd like to know if
it's possible to execute a button command for refreshing the fields of the records in a form (as it would happen pressing F5)
but I must do it with a button

Thanks
Andrea