I try to apply some actions to a list of elements (i.e. a list of invoices). The problem is that I do not know how to identify/collect this list of elements because I have to query them via a software used in my enterprise (I mean: not an Excel file). How can I identify every particular element of the list? (it could be useful saving each element in a list/vector). Besides, I do not know how to sweep one by one until the list is over. I have used relative scrapping but without solution. Note: I attach an image as example.
Thanks a lot.