How to access a MDI form from a MDIChild

Hi,
Does anybody know a GOOD way to access an mdiparent window from one of it's child windows ?!?!

All i get is an error stating that i can't create a new mdi window and stuff like that...

I would like to change the caption and access some controls in the parent ( MDI ) window...

Something like this I think.

MDIForm1.cmbFontName = ActiveFiles(X).FormFont



MDIForm1 is my Parent form and cmdFontName is a combo box on it.
The sample statement was taken from the Child Forms Activate event.

John G