In our company, we develop a program for our clients that takes files and transfer it to us.
We need to support many types of files to silently convert to pdf (for s
Maybe you could try printing them to a Postscript file, and then converting the PS file to a PDF. I think both those problems are a lot simpler:
For printing you can use the print functions of the programs which normally edit/view those files.
For converting PS->PDF there are lots of standard tools.