Informix tool related question

Good afternoon gentleman. I am a software developer for the govt in new york city and I wanted to ask a question concerning all of your informix expertise. I am trying to analyze an online web application which runs on informix, where unfortunately the source code and latest documentation is not available. Based on transactions that I can manipulate through the application GUI, I am trying to figure out how that specific transaction affects the underlying database. In other words what tables are populated, affected by the specific transaction. So would any one know if there is a tool that can tell me throught the informix version that this application runs, what exactly happened in the database, what has changed in the database, after the specific transaction has went through. Manually this could be quite tedious with just doing the before snapshot of the table data vs. the after data check. I would really appreciate any feedback I could get. Thanks Rob sending to informix-list