' Custom ControlBuilder class. Interprets nested tag name "myitem" as a textbox.
Public Class MyControlBuilder
   Inherits ControlBuilder

   Public Overrides Function GetChildControlType(tagName As String, _
                             attributes As IDictionary) As Type
      If String.Compare(tagName, "myitem", True) = 0 Then
         Return GetType(TextBox)
      End If
      Return Nothing
   End Function
End Class

<ControlBuilderAttribute(GetType(MyControlBuilder))> Public Class MyControl
   Inherits Control
   ' Stores all the controls specified as nested tags.
   Private items As New ArrayList()

   ' This function is internally invoked by IParserAccessor.AddParsedSubObject(Object).
   Protected Overrides Sub AddParsedSubObject(obj As Object)
      If TypeOf obj Is TextBox Then
         items.Add(obj)
      End If
   End Sub

  ' Override 'CreateChildControls'.
   Protected Overrides Sub CreateChildControls()
      Dim myEnumerator As System.Collections.IEnumerator = items.GetEnumerator()
      While myEnumerator.MoveNext()
         Me.Controls.Add(CType(myEnumerator.Current, TextBox))
      End While
   End Sub
End Class

// Custom ControlBuilder class. Interprets nested tag name "myitem" as a textbox. 
public class MyControlBuilder : ControlBuilder 
{
   public override Type GetChildControlType(String tagName,
                                       IDictionary attributes)
   {
      if (String.Compare(tagName, "myitem", true) == 0) 
      {
         return typeof(TextBox);
      }
      return null;
   }
}

[ 
ControlBuilderAttribute(typeof(MyControlBuilder)) 
]
public class MyControl : Control
{
   // Store all the controls specified as nested tags.
   private ArrayList items = new ArrayList();

   // This function is internally invoked by IParserAccessor.AddParsedSubObject(Object).
   protected override void AddParsedSubObject(Object obj) 
   {
      if (obj is TextBox) 
      {
         items.Add(obj);
      }
   }

   // Override 'CreateChildControls'. 
   protected override void CreateChildControls()
   {
      System.Collections.IEnumerator myEnumerator = items.GetEnumerator();
      while(myEnumerator.MoveNext())
          this.Controls.Add((TextBox)myEnumerator.Current);
   }
}    

// Custom ControlBuilder class. Interprets nested tag name "myitem" as 
// a textbox. 
public class MyControlBuilder extends ControlBuilder
{
    public Type GetChildControlType(String tagName, IDictionary attributes)
    {
        if (String.Compare(tagName, "myitem", true) == 0) {
            return TextBox.class.ToType();
        }
        return null;
    } //GetChildControlType
} //MyControlBuilder

/** @attribute ControlBuilderAttribute(MyControlBuilder.class)
 */
public class MyControl extends Control
{
    // Store all the controls specified as nested tags.
    private ArrayList items = new ArrayList();

    // This function is internally invoked by 
    // IParserAccessor.AddParsedSubObject(Object).
    protected void AddParsedSubObject(Object obj)
    {
        if (obj instanceof TextBox) {
            items.Add(obj);
        }
    } //AddParsedSubObject

    // Override 'CreateChildControls'. 
    protected void CreateChildControls()
    {
        System.Collections.IEnumerator myEnumerator = items.GetEnumerator();
        while (myEnumerator.MoveNext()) {
            this.get_Controls().Add((TextBox)myEnumerator.get_Current());
        }
    } //CreateChildControls
} //MyControl