Do not know what Excel version are you using, but starting from version 9 (probably) there is an PrToFileName additon in PrintOUt method.

expression.PrintOut(From, To, Copies, Preview, ActivePrinter, PrintToFile, Collate, PrToFileName)

>Hi all,
> I need to open and modify an excel document programmaticaly from within VFP. This part works OK. But then , when I want to print this document using the adobe PDF writer , it always open a popup window for me to enter to file name. How can I automate this process.
> I am currently using VFP 8.1 and Adobe PDF Writer prof. ver 6.0.
>
>Thanks in advance.
>
>Pierre Sauvé