在您自己的应用中可视化地包含另一个应用

I have four small single-form utility applications that I have written in Delphi (Win32), that every once in awhile I want to use in a way that makes them "feel" as if they are all one application, mostly to make switching back and forth between them super-easy. It would be great, for instance, to be able to insert them as containers inside a TabSheet, or something along those lines.I have four small single-form utility applicati