File import - get filename before open xls for import into db (v2020)

I want to import xls file into existing table.
All works fine.

For an second szenario I need to make changes inside the uploaded xls file ** before ** file is open from phpmaker for imput, as happend in events Page_Importing, and row import.

Is there an event where I can get uploded filename and file is not opend from phpmaker?