MDI Forms / Container of Forms

I know that only one MDI Form is permitted. I want to create a form that I could use a child form to a true MDI form, but it would function the same as a MDI form in respect to how it contains forms. Any ideas?

I don't know how to do this as such and I really wouldn't recommend it. It'll confuse the hell out of your users.

If you simply want to build a composit form then have a look at the SetParent API function. Search the forum and you'll find several examples.