Update Table control before PAI

Hi all,

I have a screen with a table control on it. I want to upload some data from an Excel file to the table control. I want to put the data in the table control field directly, not into my internal table. so that when the system execute the ' LOOP AT g_itb_data.' in PAI , the data will transfer from the table control to my internal table, then it will execute the check code which I write in the LOOP. I try to use FM 'DYNP_VALUES_UPDATE' in PAI , but it doesn't work. Anyone has good idea to this? thanks a lot