public static class FlashWindow

    {

        [DllImport("user32.dll")]

        [return: MarshalAs(UnmanagedType.Bool)]

        private static extern bool FlashWindowEx(ref FLASHWINFO pwfi);

        [StructLayout(LayoutKind.Sequential)]

        private struct FLASHWINFO

        {

            /// <summary>

            /// The size of the structure in bytes.

            /// </summary>

            public uint cbSize;

            /// <summary>

            /// A Handle to the Window to be Flashed. The window can be either opened or minimized.

            /// </summary>

            public IntPtr hwnd;

            /// <summary>

            /// The Flash Status.

            /// </summary>

            public uint dwFlags;

            /// <summary>

            /// The number of times to Flash the window.

            /// </summary>

            public uint uCount;

            /// <summary>

            /// The rate at which the Window is to be flashed, in milliseconds. If Zero, the function uses the default cursor blink rate.

            /// </summary>

            public uint dwTimeout;

        }

        /// <summary>

        /// Stop flashing. The system restores the window to its original stae.

        /// </summary>

        public const uint FLASHW_STOP = ;

        /// <summary>

        /// Flash the window caption.

        /// </summary>

        public const uint FLASHW_CAPTION = ;

        /// <summary>

        /// Flash the taskbar button.

        /// </summary>

        public const uint FLASHW_TRAY = ;

        /// <summary>

        /// Flash both the window caption and taskbar button.

        /// This is equivalent to setting the FLASHW_CAPTION | FLASHW_TRAY flags.

        /// </summary>

        public const uint FLASHW_ALL = ;

        /// <summary>

        /// Flash continuously, until the FLASHW_STOP flag is set.

        /// </summary>

        public const uint FLASHW_TIMER = ;

        /// <summary>

        /// Flash continuously until the window comes to the foreground.

        /// </summary>

        public const uint FLASHW_TIMERNOFG = ;

        /// <summary>

        /// Flash the spacified Window (Form) until it recieves focus.

        /// </summary>

        /// <param name="form">The Form (Window) to Flash.</param>

        /// <returns></returns>

        public static bool Flash(Window w)

        {

            // Make sure we're running under Windows 2000 or later

            if (Win2000OrLater)

            {

                FLASHWINFO fi = Create_FLASHWINFO(new WindowInteropHelper(w).Handle, FLASHW_ALL | FLASHW_TIMERNOFG, uint.MaxValue, );

                return FlashWindowEx(ref fi);

            }

            return false;

        }

        private static FLASHWINFO Create_FLASHWINFO(IntPtr handle, uint flags, uint count, uint timeout)

        {

            FLASHWINFO fi = new FLASHWINFO();

            fi.cbSize = Convert.ToUInt32(Marshal.SizeOf(fi));

            fi.hwnd = handle;

            fi.dwFlags = flags;

            fi.uCount = count;

            fi.dwTimeout = timeout;

            return fi;

        }

        /// <summary>

        /// Flash the specified Window (form) for the specified number of times

        /// </summary>

        /// <param name="form">The Form (Window) to Flash.</param>

        /// <param name="count">The number of times to Flash.</param>

        /// <returns></returns>

        public static bool Flash(Window w, uint count)

        {

            if (Win2000OrLater)

            {

                FLASHWINFO fi = Create_FLASHWINFO(new WindowInteropHelper(w).Handle, FLASHW_ALL, count, );

                return FlashWindowEx(ref fi);

            }

            return false;

        }

        /// <summary>

        /// Start Flashing the specified Window (form)

        /// </summary>

        /// <param name="form">The Form (Window) to Flash.</param>

        /// <returns></returns>

        public static bool Start(Window w)

        {

            if (Win2000OrLater)

            {

                var fi = Create_FLASHWINFO(new WindowInteropHelper(w).Handle, FLASHW_ALL, uint.MaxValue, );

                return FlashWindowEx(ref fi);

            }

            return false;

        }

        /// <summary>

        /// Stop Flashing the specified Window (form)

        /// </summary>

        /// <param name="form"></param>

        /// <returns></returns>

        public static bool Stop(Window w)

        {

            if (Win2000OrLater)

            {

                var fi = Create_FLASHWINFO(new WindowInteropHelper(w).Handle, FLASHW_STOP, uint.MaxValue, );

                return FlashWindowEx(ref fi);

            }

            return false;

        }

        /// <summary>

        /// A boolean value indicating whether the application is running on Windows 2000 or later.

        /// </summary>

        private static bool Win2000OrLater

        {

            get { return System.Environment.OSVersion.Version.Major >= ; }

        }

}