Vista TaskDialog Wrapper and Emulator

//------------------------------------------------------------------
// <summary>
// A P/Invoke wrapper for TaskDialog. Usability was given preference to perf and size.
// </summary>
//
// <remarks/>
//------------------------------------------------------------------

namespace PSTaskDialog
{
    using System;
    using System.Drawing;
    using System.Windows.Forms;
    using System.Runtime.InteropServices;

    /// <summary>
    /// Arguments passed to the TaskDialog callback.
    /// </summary>
    public class VistaTaskDialogNotificationArgs
    {
        /// <summary>
        /// What the TaskDialog callback is a notification of.
        /// </summary>
        private VistaTaskDialogNotification notification;

        /// <summary>
        /// The button ID if the notification is about a button. This a DialogResult
        /// value or the ButtonID member of a TaskDialogButton set in the
        /// TaskDialog.Buttons or TaskDialog.RadioButtons members.
        /// </summary>
        private int buttonId;

        /// <summary>
        /// The HREF string of the hyperlink the notification is about.
        /// </summary>
        private string hyperlink;

        /// <summary>
        /// The number of milliseconds since the dialog was opened or the last time the
        /// callback for a timer notification reset the value by returning true.
        /// </summary>
        private uint timerTickCount;

        /// <summary>
        /// The state of the verification flag when the notification is about the verification flag.
        /// </summary>
        private bool verificationFlagChecked;

        /// <summary>
        /// The state of the dialog expando when the notification is about the expando.
        /// </summary>
        private bool expanded;

        /// <summary>
        /// What the TaskDialog callback is a notification of.
        /// </summary>
        public VistaTaskDialogNotification Notification
        {
            get { return this.notification; }
            set { this.notification = value; }
        }

        /// <summary>
        /// The button ID if the notification is about a button. This a DialogResult
        /// value or the ButtonID member of a TaskDialogButton set in the
        /// TaskDialog.Buttons member.
        /// </summary>
        public int ButtonId
        {
            get { return this.buttonId; }
            set { this.buttonId = value; }
        }

        /// <summary>
        /// The HREF string of the hyperlink the notification is about.
        /// </summary>
        public string Hyperlink
        {
            get { return this.hyperlink; }
            set { this.hyperlink = value; }
        }

        /// <summary>
        /// The number of milliseconds since the dialog was opened or the last time the
        /// callback for a timer notification reset the value by returning true.
        /// </summary>
        public uint TimerTickCount
        {
            get { return this.timerTickCount; }
            set { this.timerTickCount = value; }
        }

        /// <summary>
        /// The state of the verification flag when the notification is about the verification flag.
        /// </summary>
        public bool VerificationFlagChecked
        {
            get { return this.verificationFlagChecked; }
            set { this.verificationFlagChecked = value; }
        }

        /// <summary>
        /// The state of the dialog expando when the notification is about the expando.
        /// </summary>
        public bool Expanded
        {
            get { return this.expanded; }
            set { this.expanded = value; }
        }
    }
}