Hello, John
Wrapping calls to reports and forms in procedures in the called programs would be the first to come to mind and may involve the least amount of effort but it's the old way of doing things.

A better design and more OO is to convert these exe's to classes whose methods call these forms and reports, those classes will get instantiated in the main prg thereby giving you access to all their public methods. Later down the road, you have the option of converting those classes into COM (exe or DLLs) objects with minimal effort if needed espcially for the reports if they start to run slow.