How to have Scroll Bars to MDI Form?

Question

Well! Dears. i have an mdi form in which i open differnet child forms . when both parent and child are maximized its ok but when i restore the MDI parent form it disturbs the layout of Child form that was Maximized in MDI. What i want is that when i restore MDI form it doesnt disturb the layout design of Child form instead it (MDI form) gets Horizantal and vertical scroll bar keeping the Child Form Maximized and undisturbed. How to do that. Thnx in Advance.