Zooming from a Baan/Infro ERP Ln session to an external application may require source code change with all the difficulty associated with such a change. This solution requires Form only Tools change, or no Tools change at all. It enables calling a windows based program from within a session, while passing necessary parameters. The solution supports calling multiple external applications, zooming to multiple Baan/Infro ERP Ln sessions – all from the same session.