buf

         /// <summary>
        /// Win32 API Imports
        /// </summary>
        [DllImport("user32.dll")] private static extern bool ShowWindowAsync(IntPtr hWnd, int nCmdShow);
        [DllImport("user32.dll")] private static extern bool SetForegroundWindow(IntPtr hWnd);
        [DllImport("user32.dll")] private static extern bool IsIconic(IntPtr hWnd);
        [DllImport("user32.dll")] private static extern bool IsZoomed(IntPtr hWnd);
        [DllImport("user32.dll")] private static extern IntPtr GetForegroundWindow();
        [DllImport("user32.dll")] private static extern IntPtr GetWindowThreadProcessId(IntPtr hWnd, IntPtr ProcessId);
        [DllImport("user32.dll")] private static extern IntPtr AttachThreadInput(IntPtr idAttach, IntPtr idAttachTo, int fAttach);

        /// <summary>
        /// Win32 API Constants for ShowWindowAsync()
        /// </summary>
        private const int SW_HIDE = 0;
        private const int SW_SHOWNORMAL = 1;
        private const int SW_SHOWMINIMIZED = 2;
        private const int SW_SHOWMAXIMIZED = 3;
        private const int SW_SHOWNOACTIVATE = 4;
        private const int SW_RESTORE = 9;
        private const int SW_SHOWDEFAULT = 10;

        /// <summary>
        /// Sets focus to this Window Object
        /// </summary>
        public void ActivateWindow(IntPtr hWnd)
        {
            if(hWnd == GetForegroundWindow())
                return;

            IntPtr ThreadID1 = GetWindowThreadProcessId(GetForegroundWindow(),IntPtr.Zero);
            IntPtr ThreadID2 = GetWindowThreadProcessId(hWnd,IntPtr.Zero);
            
            if (ThreadID1 != ThreadID2)
            {
                AttachThreadInput(ThreadID1,ThreadID2,1);
                SetForegroundWindow(hWnd);
                AttachThreadInput(ThreadID1,ThreadID2,0);
            }
            else
            {
                SetForegroundWindow(hWnd);
            }

            if (IsIconic(hWnd))
            {
                ShowWindowAsync(m_hWnd,SW_RESTORE);
            }
            else
            {
                ShowWindowAsync(hWnd,SW_SHOWNORMAL);
            }
        }
    }