C#

using System.Windows.Forms;<br />
public class Test<br />
{<br />
    static void Main()<br />
    {<br />
        Application.Run(new MainForm());<br />
    }<br />
}<br />
<br />
class MainForm : Form<br />
{<br />
    public MainForm()<br />
    {<br />
        WindowState = FormWindowState.Maximized;<br />
        IsMdiContainer = true;<br />
        Form frm = new Childform();<br />
        frm.MdiParent = this;<br />
        frm.Show();<br />
        Form frm2 = new Childform();<br />
        frm2.MdiParent = this;<br />
        frm2.Show();<br />
        frm2.Left = 2000;<br />
    }<br />
}<br />
<br />
class Childform : Form<br />
{<br />
    public Childform()<br />
    {<br />
        Controls.Add(new Mycontrols());<br />
    }<br />
}<br />
<br />
class Mycontrols : UserControl<br />
{<br />
    public Mycontrols()<br />
    {<br />
        TextBox tb1 = new TextBox();<br />
        tb1.Text = "TextBox1";<br />
        TextBox tb2 = new TextBox();<br />
        Controls.Add(tb1);<br />
        tb2.Top = 100;<br />
        tb2.Text = "TextBox2";<br />
        tb2.Select();<br />
        Controls.Add(tb2);<br />
    }<br />
}