ToolStripContainer & Changing MDI layout

         private void ConnectToolStripContainerAndDock()
        {
            this.components = new Container();
            this.dockManager = new DockManager(this.components);

            this.SuspendLayout();
            ((System.ComponentModel.ISupportInitialize)(this.dockManager)).BeginInit();

            this.IsMdiContainer = true;

            this.dockManager.DefaultMdiWindowState = System.Windows.Forms.FormWindowState.Maximized;
            this.dockManager.DocumentMdiStyle = ActiproSoftware.UIStudio.Dock.DocumentMdiStyle.Standard;
            this.dockManager.NextWindowNavigationEnabled = true;

            // Add menu with two entries.
            // one to create a new form and another to toggle mdi-mode
            toolStripContainer = new ToolStripContainer();
            toolStripContainer.Dock = DockStyle.Fill;
            toolStripContainer.TopToolStripPanel.Join(ms);

            // Form used as parent for UIstudio dock area
            Form formContainer = new Form();
            formContainer.TopLevel = false;
            formContainer.Dock = DockStyle.Fill;
            //formContainer.IsMdiContainer = true;

            toolStripContainer.ContentPanel.Controls.Add(formContainer);
            this.dockManager.HostContainerControl = formContainer;

            this.Controls.Add(toolStripContainer);
    
            ((System.ComponentModel.ISupportInitialize)(this.dockManager)).EndInit();

            this.ResumeLayout(false);
            this.PerformLayout();
        }

        private void newToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Form f = new Form();
            f.Name = "ChildForm";
            f.MdiParent = this;
            f.Visible = true;
            f.TopLevel = false;
            f.FormBorderStyle = FormBorderStyle.None;
            f.Dock = DockStyle.Fill;
            string key = "1";
            string text = f.Name;

            DocumentWindow documentWindow = new DocumentWindow(dockManager, key, text + key, 0, f);
            documentWindow.Activate();
        }

        private void toggleMDIModeToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (dockManager.DocumentMdiStyle == DocumentMdiStyle.Tabbed)
                dockManager.DocumentMdiStyle = DocumentMdiStyle.Standard;
            else
                dockManager.DocumentMdiStyle = DocumentMdiStyle.Tabbed;
        }

 
   // Merge or revert merge
    if (this.ActiveMdiChild is BarMdiMergeChildForm) {
        BarMdiMergeChildForm childForm = (BarMdiMergeChildForm)this.ActiveMdiChild;
        BarManager.Merge(childForm.MenuBar, barManager.MenuBar, true);
    }
    else
        BarManager.RevertAllMerges(barManager.MenuBar);