[DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]
        public static extern IntPtr FindWindow(string lpClassName, string lpWindowName); //发送消息

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern Int32 SendMessage(IntPtr hWnd, int msg, int wParam, [MarshalAs(UnmanagedType.LPWStr)] string lParam);

        [DllImport("user32.dll")]
        private static extern bool SendMessage(IntPtr hwnd, int msg, int wParam, StringBuilder lParam);

        [DllImport("user32.dll", SetLastError = true)]
        static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);

        [DllImport("user32.dll", SetLastError = true)]
        static extern bool GetWindowRect(IntPtr hwnd, out RECT lpRect);
        public Form1()
        {
            InitializeComponent();
        }
        const int WM_MOUSEMOVE = 0X0200;
        //刷新任务栏图标  
        void RefreshTaskbarIcon()
        {
            //任务栏窗口  
            IntPtr hShellTrayWnd = FindWindow("Shell_TrayWnd", null);
            //任务栏右边托盘图标+时间区  
            IntPtr hTrayNotifyWnd = FindWindowEx(hShellTrayWnd, IntPtr.Zero, "TrayNotifyWnd", null);
            //不同系统可能有可能没有这层  
            IntPtr hSysPager = FindWindowEx(hTrayNotifyWnd, IntPtr.Zero, "SysPager", null);
            //托盘图标窗口  
            IntPtr hToolbarWindow32;

            hToolbarWindow32 = FindWindowEx(hSysPager, IntPtr.Zero, "ToolbarWindow32", null);
            if (hToolbarWindow32 != IntPtr.Zero)
            {
                RECT r;
                GetWindowRect(hToolbarWindow32, out r);
                int width = r.right - r.left;
                int height = r.bottom - r.top;
                //从任务栏中间从左到右 MOUSEMOVE一遍，所有图标状态会被更新  
                for (int x = 1; x < width; x++)
                {
                    SendMessage(hToolbarWindow32, WM_MOUSEMOVE, 0, MAKELPARAM((uint)x, (uint)height / 2));
                }
                //for (int x = 1; x < width; x++)
                //{
                //    for (int y = 0; y < height; y += 4)
                //    {
                //        SendMessage(hToolbarWindow32, WM_MOUSEMOVE, 0, MAKELPARAM((uint)x, (uint)height / 2));
                //    }
                //}
            }
            hToolbarWindow32 = FindWindowEx(hTrayNotifyWnd, IntPtr.Zero, "ToolbarWindow32", null);
            if (hToolbarWindow32 != IntPtr.Zero)
            {
                RECT r;
                GetWindowRect(hToolbarWindow32, out r);
                int width = r.right - r.left;
                int height = r.bottom - r.top;
                //从任务栏中间从左到右 MOUSEMOVE一遍，所有图标状态会被更新  

                for (int x = 1; x < width; x++)
                {
                    for (int y = 0; y < height; y += 4)
                    {
                        SendMessage(hToolbarWindow32, WM_MOUSEMOVE, 0, MAKELPARAM((uint)x, (uint)height / 2));
                    }
                }
            }
        }
        string MAKELPARAM(uint wLow, uint wHigh)
        {
            return (wHigh * 0x10000 + wLow).ToString();
        }

        public static IntPtr MakeLParam(int LoWord, int HiWord)
        {
            return (IntPtr)(HiWord << 16 | (LoWord & 65535));
        }

        [StructLayout(LayoutKind.Sequential)]
        private struct RECT
        {
            public int left;
            public int top;
            public int right;
            public int bottom;
        }