Navigation b/n forms

Question

Hi everyone, I got a problem while navigating between forms. I have 3 forms namely form1,form2,form3 form1 is parent of form2. form2 is parent of form3. here I want to display form1 always ..... and from form1, I ll call form2. then from form2, I ll call form3 at that time my form2 should hide and form3 should appear ... In form3, I have a cancel button... if i click that btn my form2 should appear and form3 should close and note that during al these process my form1 should be appear in the background.(but its not active till its child form i.e form2 completely closes) please help me out to do this