Program for comparing word documents

To view the differences between one and the other? I know that Fiel uses one such example to assess what was different from the new patch in the old patch, so it must exist- the problem is, I don't know where to find such a program. Does anyone know?

How do I code such a program? Or, is there already one readily available? Preferably one that goes through text documents.

Text documents as in .txt? I might have a Java one lying around from when I programmed for school.

Is there one available on the web? I'm not sure if I can compile Java (I only have microsoft visual c++ and netbeans, which I never use).

For txt docs try Winmerge. If you've Word 2000 or later you can use it as well.

I'm using microsoft office word 2007, and I can't find the 'tools' button.

Yeah, appears they moved it... {try here}.