usercontrols not saving data such as button/trackbar values

        private void addUserControl(System.Windows.Forms.UserControl userControl)
        {
            userControl.Dock = DockStyle.Fill;
            mainpanel.Controls.Clear();
            mainpanel.Controls.Add(userControl);
            mainpanel.SendToBack();
            userControl.BringToFront();
        }

        private void SettingsButton_Click(object sender, EventArgs e)
        {
            SettingsButton.FillColor = Color.Silver;
            realsettings uc = new realsettings();
            addUserControl(uc);
            ProgramButton.FillColor = Color.DimGray;
        }