C#

<httpHandlers>
  <add verb="*" path="*.asp" type="MyNamespace.MyHandlerClass"/>
</httpHandlers>

<httpHandlers>
  <remove verb="*" path="*.asp"/>
</httpHandlers>

public class MyParent : Form
{
  private MyChild uc1;
  public MyParent()
  {
    // ...
    uc1 = new MyChild();
    uc1.Location = new Point(8, 8);
    uc1.Size = new Size(Width - 16, Height - 16);
    Controls.Add(uc1);
  }
  // ...
  protected override void OnResize(EventHandler e)
  {
    uc1.Size = new Size(Width - 16, Height - 16);
  }
}
public class MyChild : UserControl
{
}

public class MyParent : Form
{
}
public class MyChild : UserControl
{
  protected override void OnParentChanged(EventArgs e)
  {
    if (Parent != null)
      Parent.Resize += new EventHandler(Parent_Resize);
  }
  private void Parent_Resize(object sender, EventArgs e)
  {
    this.Size = new Size(Parent.Size.Width - 16, Parent.Size.Height - 16);
  }
}