how to created mdi &his child form create

protected void MDIChildNew_Click(object sender, System.EventArgs e){
   Form2 newMDIChild = new Form2();
   // Set the Parent Form of the Child window.
   newMDIChild.MdiParent = this;
   // Display the new form.
   newMDIChild.Show();
}

http://msdn.microsoft.com/en-us/library/7aw8zc76(VS.80).aspx[^]


Also If you want to permanently set "Form2" as an Mdichild of "Form1"

the put the folowing line in form2_Load

private void Form2_Load(object sender, EventArgs e)
{
 newMDIChild.MdiParent = Form1;
}