Retrieving and Sending data from external programs

I am currently looking at a project but do not know how to start tackling the problem.
I have a couple of similar programs written in different languages (not JAVA) that I do not have access to the source code.
I need to enter data into fields in a new JSP page and paste the same data into their corresponding fields in the programs that I do not have access to their source codes.
I considered using coordinates but it may have major maintainence problems in the future.
Any help will be much appreciated.

Welcome to JavaRanch, Robin!
I'm moving this to [url=]The Intermediate Forum[/url]...