If you are speaking of the correct form, then what you are wanting it to create dockable forms rather than childs. You can still use your MDI form with MDI childs in it however, I'd create your properties page on a non child form and make it dockable. Resize and position the MDI childs according to the position of the property form. If you'll notice in VB6 the only child forms are the forms and modules that you include in your project. All of the control/property/project windows/forms are dockable forms. Try closing them and you'll see what I mean.