C#

using System;
using System.Windows.Forms;
using System.Windows.Forms.Design;

[System.ComponentModel.DesignerCategory("code")]
[ToolStripItemDesignerAvailability(ToolStripItemDesignerAvailability.ToolStrip | ToolStripItemDesignerAvailability.ToolStrip)]

public class ToolStripCheckBox : ToolStripControlHost
{
   
    public ToolStripCheckBox() : base(new CheckBox())
    {
        
    }

    public CheckBox CheckBoxControl
    {
        get { return Control as CheckBox; }
    }

    public bool Checked
    {
        get { return CheckBoxControl.Checked; }
        set { CheckBoxControl.Checked = value; }
    }

    public event EventHandler CheckedChanged;

    public void OnCheckedChanged(object sender, EventArgs e)
    {
        // not thread safe!
        if (CheckedChanged != null)
        {
            CheckedChanged(sender, e);
        }
    }

    protected override void OnSubscribeControlEvents(Control control)
    {
        base.OnSubscribeControlEvents(control);
        (control as CheckBox).CheckedChanged += OnCheckedChanged;
    }

    protected override void OnUnsubscribeControlEvents(Control control)
    {
        base.OnUnsubscribeControlEvents(control);
        (control as CheckBox).CheckedChanged -= OnCheckedChanged;
    }
}