Take a report, like one of our samples, right click on the report and choose Section controller. The section controller allows you to add new sections to a report. For each section you could add controls and bring in data .. or in the section  controller... upper right add an additional detail section. Now in the property window for this second detail, you have the before print event and after print event. I believe that you can do your call to your existing program in the before print event and that your called data will be in the report.