It sometimes depends on the OS as well as the version of Paradox, but I'd recommend installing Distiller and Distiller's Assistant so that the latter watches a specific directory.
Then set up a PostScript printer (like an Apple) in Windows. In Paradox, print to that printer, and, if you are using Paradox 10-11, you can define the destination within the code. So, you send it directly to where the Assistant is waiting.
To finish, wait Paradox for some seconds and then get it to run Acrobat with the newly-created .PDF file.
hth
Mike Irwin