How to convert a rtf,doc,xls file on the fly to a pdf with Coldfusion

What I have here is a folder stored on a shared drive. In this folder are Word and Excel files that I want to display on my Coldfusion site but in PDF form.

I would like to somehow convert these Word and Excel files to PDF on the fly when the end-user uploads them to my shared server folder. Is that possible.

I am trying to avoid having to go in and convert the files to PDF with Adobe by hand. And, I don't want to display anything in Excel and Word on the site.

Any ideas?

Thanks