system_Broken 0 Newbie Poster

i have 2 pages along with Mainform.
I have one fram in mainform . i want navigate other page in the fram of mainform by other page is it possible ?

            MainWindow mainform = new MainWindow();
            Forms.cadastrauser cadastrauser = new Forms.cadastrauser();
            mainform.hostfram.Navigate(cadastrauser);
            mainform.home_lbl.Content = "Cadastra Usuario";
            mainform.hostfram.Refresh();

i am not navigating direct in Mainform . from third form i want navigate 2 form in fram of Main hwo to do this plz help?