C# 窗口程序运行期间，修改图标，模拟闪动的效果

C# Console Windows icon change 。 Blink icon。

C# 窗口程序运行期间，修改图标，模拟出图标闪动的效果。Blink icon！

in your Program class：

       [DllImport("user32.dll", EntryPoint = "SendMessage")]

        private static extern int SendMessage(
        IntPtr hWnd,　　　// handle to destination window
        int Msg,　　　    // message 
        int wParam,     　// first message parameter
        int lParam       // second message parameter
        );

        [DllImport("Kernel32.dll", EntryPoint = "GetConsoleWindow")]
        public static extern IntPtr GetConsoleWindow();

        private const int STD_OUTPUT_HANDLE = -11;
        private static IntPtr INVALID_HANDLE_VALUE = new IntPtr(-1);
        private const int WM_SETICON = 0x0080;
        static bool gline = true;

        //Creat blink thread in your program main（）  
        //Thread thread = new Thread(new ThreadStart(BlinkConsoleWindow));  & start the thread
        public static void BlinkConsoleWindow()
        {
            string a_char = "|";
            while (true)
            {
                Console.Title = "My App Running!    " + a_char; //显示旋转的竖线 whirl |
                Thread.Sleep(300);
                switch (a_char)
                {
                    case "|":
                        a_char = "/";
                        break;
                    case "/":
                        a_char = "-";
                        break;
                    case "-":
                        a_char = @"\";
                        break;
                    case @"\":
                        a_char = "|";
                        break;
                    default:
                        a_char = "=";
                        break;
                }
                //闪烁Console窗口图标
                IntPtr hnd = GetConsoleWindow();               
                IntPtr icon ;
                if (gline)
                {
                    icon = BuildBin.Properties.Resources._1.Handle; //需要创建资源文件，并将图标放到资源文件中
                }
                else
                {
                    icon = BuildBin.Properties.Resources._2.Handle; //Create Resources file,& put your icon in
                }
                gline = !gline;
                if (hnd != INVALID_HANDLE_VALUE)
                {
                    SendMessage(hnd, WM_SETICON, 0, (int) icon);     //发送更替图标的消息
                }

            }

        }