How to detect the newly added currencies in Currencies and Exchange Rate form on save button click?

SOLVED

Hi all,

On the form Currencies and Exchange Rate, I need to detect if user have added new currency on the currenciesGrid and prompt user and at the moment the Save button is clicked. But I am not getting much information about it.

OnClick Save button, I can get the currenciesGrid items but there is no telling whether the item are newly added or not. Please help. Thank you.