Where to add events after a collection editor has created an instance of the object

public partial class User : UserControl
{
    public ButtonsCollection m_MultipleItems;

    [Editor(typeof(CustomCollectionEditor), typeof(UITypeEditor))]
    [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
    [MergableProperty(false)]
    [Description("Contains ListView, Button and CheckBox items in a List<Control> collection")]
    [Category("Behaviour")]
    public ButtonsCollection _MultipleItems
    {
            get
            {
                if (m_MultipleItems == null)
                    m_MultipleItems = new ButtonsCollection(this);
                return m_MultipleItems;
            }
    }

    //collectioneditor class
    public class CustomCollectionEditor : CollectionEditor
    {
        public CustomCollectionEditor()
            : base(typeof(ButtonsCollection))
        {
        }

        protected override object CreateInstance(Type itemType)
        {
            Control control = base.CreateInstance(itemType) as Control;
            if (itemType == typeof(Button))
            {
                control.Text = "My Button";
            }

            else if (itemType == typeof(Label))
            {
                control.Text = "My Label";
            }

            else if (itemType == typeof(CheckBox))
            {
                control.Text = "My CheckBox";
            }

            else if (itemType == typeof(TextBox))
            {
                control.Text = "My TextBox";
            }

            return control;
        }

        protected override string GetDisplayText(object value)
        {
            Control control = value as Control;
            return string.Format("{0} - {1}", control.GetType().Name, control.Text);
        }

        protected override Type[] CreateNewItemTypes()
        {
            return new Type[] { typeof(TextBox), typeof(Button), typeof(CheckBox), typeof(Label) };
        }
    }
}

public class ButtonsCollection : CollectionBase
    {
        Control m_Parent;

        public ButtonsCollection(Control Parent)
        {
            m_Parent = Parent;
        }

        public virtual Control this[int index]
        {
            get { return (Control)List[index]; }
        }

        protected override void OnInsert(int index, object value)
        {
            base.OnInsert(index, value);
            m_Parent.Controls.Add((Control)value);
        }

        protected override void OnRemove(int index, object value)
        {
            base.OnRemove(index, value);
            m_Parent.Controls.Remove((Control)value);
        }
}