C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;

using System.ComponentModel.Design;

namespace MyNameSpace.Components
{
    [Designer(typeof(BevelDesigner))]
    public partial class Bevel : UserControl
    {
        public Bevel()
        {
            InitializeComponent();
        }
    }

    internal class BevelDesigner : ComponentDesigner
    {
        public override System.ComponentModel.Design.DesignerVerbCollection Verbs
        {
            get
            {
                DesignerVerbCollection v = new DesignerVerbCollection();
                v.Add(new DesignerVerb("Flip", new EventHandler(FllipHandler)));
                return v;
            }
        }

        private void FllipHandler(object sender, System.EventArgs e)
        {
            //MessageBox.Show("You clicked the test designer verb!");
        }
    }
}