loading a form from a child into the parent

I got a mdi form where i load a child form.
now i want to load from the child form as part of the
parent form mdi.

I believe you can set it's parent property to the main mdi parent form. Just have to have a reference. Shouldn't be hard because the child form itself has a reference in it's parent property. I haven't tryed this yet, so sorry if it doesn't work.