I don't believe the Java interacts with it. I don't know how to test that. The Java launches Winword and feeds it data. I don't know how it feeds Winword, named pipe, macro, from the command line, temp file, or maybe something like HTTPs get or put methods.

How do I test/capture/figure out the input method? What class/methods would I use to launch WinWord from .NET?

It's kind of like a mail merge between Access and Word....

I need WinWord to look like it's being executed from the correct path: C:\Program Files\Microsoft Office\Office12 \WinWord.exe when in reality it's being launch from a Java app using the path C:\Program Files\Microsoft Office\Office11 \WinWord.exe. A program (Java) from the Internet (so it only knows the configuration it has stored) launches 'C:\Program Files\Microsoft Office\Office11 \Winword.exe' and sends it a macro to build a form on the client....