Example with MDI Froms:-

• Create A New Windows Forms Application with the Name WAMDI
• By Deafault WAMDI Contains Form1
• Add Two New Forms to the Application with a the name Form2,FormMDI
• Create a label on Form2

Set the Following Propertie(s) to the label1:-

Label1:-

Name          :         lblDisplay

Text            :         This is Form1

Create a label on Form2

Set the Following Propertie(s) to the label1:-

label1:-

Name          :         lblDisplay

Text            :         This is Form2

FormMDI:-

Name                    :         FormMDI

Text                      :         FormMDI

IsMdiContainer     :         True

Create one MenuStrip  Control on FormMDI & set the following properties to it

[menuStrip1 will only appear in Component tray]

menuStrip1:-

Name          :         menuStrip1

         

Set fallowing properties to ToolStripMenuItem  properties:

Open:- Name          :         mnuOPen Text            :         &Open Form1:- Name          :         smnuOForm1 Text            :         Form&1 From2:- Name          :         smnuOForm2 Text            :         Form&2 Close:- Name          :         mnuClose Text            :         &Close Form1:- Name          :         smnuCForm1 Text            :         Form1 From2:- Name          :         smnuCForm2 Text            :         Form2

Window:- Name          :         mnuWindow Text            :         &Window TileHorizontally:- Name          :          smnuTileHorizontally Text            :         TileHorizontally TileVertically:- Name          :         smnuTileVertically Text            :         TileVertically Cascade:- Name          :         smnuCascade Text            :         Cascade

Design :-

Form1

Form2

FormMDI

• Generate the Event Handlers for
• smnuOForm1,smnuOForm2,smnuCForm1,smnuCForm2,smnuTileHorizontally,smnuTileVertically,smnuCascade Click Events& write the following code in Source[FormMenu.cs]

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace WAMDI {     public partial class FormMDI : Form     {         public static Form1 obj1 = new Form1();         public static Form2 obj2 = new Form2();         public FormMDI()         {             InitializeComponent();         }         private void smnuOForm1_Click(object sender, EventArgs e)         {             if (obj1 == null)             {                 obj1 = new Form1();             }             obj1.MdiParent = this;             obj1.Show();         }         private void smnuOForm2_Click(object sender, EventArgs e)         {             if (obj2 == null)             {                 obj2 = new Form2();             }             obj2.MdiParent = this;             obj2.Show();         }         private void smnuExit_Click(object sender, EventArgs e)         {             Application.Exit();         }         private void smnuCForm1_Click(object sender, EventArgs e)         {             obj1.Hide();             FormMDI.obj1 = null;         }         private void smnuCForm2_Click(object sender, EventArgs e)         {             obj2.Hide();             FormMDI.obj2 = null;         }         private void smnuTileHorizontal_Click(object sender, EventArgs e)         {             this.LayoutMdi(MdiLayout.TileHorizontal);         }         private void smnuTileVertical_Click(object sender, EventArgs e)         {             this.LayoutMdi(MdiLayout.TileVertical);         }         private void smnuCascade_Click(object sender, EventArgs e)         {             this.LayoutMdi(MdiLayout.Cascade);         }     } }

Result :-

Run the Application & Check