printing using shellexecute - retrieving name of printed file

[hsifelbmur]

We are writing an app that automates printing of documents of different
types. These documents are printed to PostScript files, not to a
printer. The app uses shellExecute with the "printto" verb (and the
Process class). This is a server app which requires that everything is
done without user intevention.
The problem is that we need to grab these PostScript files after
they've been printed, for further processing. Is there a way to set the
name of the file that will be printed so we can be sure we're
retrieving the correct file (not some random file that was printed by
someone else for a different purpose - this server may be used for
other things as well)? How can we track the print process and know when
an app is stuck (e.g. Word is trying to print a doc file but gets stuck
on some user prompt) so that we can handle them without user
intervention?
Help will be strongly appreciated... :)