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public Form1()

{

// Make Form MDI Parent

this.IsMdiContainer = true;

// Add toolstrip panels

ToolStripPanel tspTop = new ToolStripPanel();

ToolStripPanel tspBottom = new ToolStripPanel();

ToolStripPanel tspLeft = new ToolStripPanel();

ToolStripPanel tspRight = new ToolStripPanel();

// dock the ToolStripPanels

tspTop.Dock = DockStyle.Top;

tspBottom.Dock = DockStyle.Bottom;

tspLeft.Dock = DockStyle.Left;

tspRight.Dock = DockStyle.Right;

// add toolstrips to move around between the panels

ToolStrip tsTop = new ToolStrip();

tsTop.Items.Add("Top");

tspTop.Join(tsTop);

ToolStrip tsBottom = new ToolStrip();

tsBottom.Items.Add("Bottom");

tspBottom.Join(tsBottom);

ToolStrip tsRight = new ToolStrip();

tsRight.Items.Add("Right");

tspRight.Join(tsRight);

ToolStrip tsLeft = new ToolStrip();

tsLeft.Items.Add("Left");

tspLeft.Join(tsLeft);

// add menustrip, with new window

MenuStrip ms = new MenuStrip();

ToolStripMenuItem windowMenu = new ToolStripMenuItem("Window");

ToolStripMenuItem windowNewMenu = new ToolStripMenuItem("New", null, new EventHandler(windowNewMenu_Click));

windowMenu.DropDownItems.Add(windowNewMenu);

((ToolStripDropDownMenu)(windowMenu.DropDown)).ShowImageMargin = false;

((ToolStripDropDownMenu)(windowMenu.DropDown)).ShowCheckMargin = true;

ms.MdiWindowListItem = windowMenu;

ms.Items.Add(windowMenu);

ms.Dock = DockStyle.Top;

// Form.MainMenuStrip determines merge target

MainMenuStrip = ms;

// add a button to the MDIClient area

Button b = new Button();

b.AutoSize = true;

b.Text = "In the MDI Container";

// Add the ToolStripPanels to the form in reverse order

this.Controls.Add(tspRight);

this.Controls.Add(tspLeft);

this.Controls.Add(tspBottom);

this.Controls.Add(tspTop);

// add menustrip last - Z order!

this.Controls.Add(ms);

}

void windowNewMenu_Click(object sender, EventArgs e)

{

Form f = new Form();

f.MdiParent = this;

f.Text = "Form - " + this.MdiChildren.Length.ToString();

f.Show();

}

}