xenadmin/XenAdmin/Controls/MenuStripEx.cs

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

namespace XenAdmin.Controls
{
    /// <summary>
    /// A System.Windows.Forms.MenuStrip with the option of click-through
    /// (see http://blogs.msdn.com/rickbrew/archive/2006/01/09/511003.aspx)
    /// </summary>
    public class MenuStripEx : MenuStrip
    {
        private bool clickThrough;

        /// <summary>
        /// Gets or sets whether the MenuStripEx honors item clicks when its containing form does
        /// not have input focus.
        /// </summary>
        /// <remarks>
        /// Default value is false, which is the same behavior provided by the base MenuStrip class.
        /// </remarks>
        public bool ClickThrough
        {
            get
            {
                return this.clickThrough;
            }
            set
            {
                this.clickThrough = value;
            }
        }

        protected override void WndProc(ref Message m)
        {
            base.WndProc(ref m);
            if (this.clickThrough &&
                m.Msg == NativeConstants.WM_MOUSEACTIVATE &&
                m.Result == (IntPtr)NativeConstants.MA_ACTIVATEANDEAT)
            {
                m.Result = (IntPtr)NativeConstants.MA_ACTIVATE;
            }
        }
    }
}