using System.Runtime.InteropServices; // これが必要！
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace KssSmaPlaLib.Alert
{
    // --- ここからコピー ---
    [StructLayout(LayoutKind.Sequential)]
    public struct FLASHWINFO
    {
        public uint cbSize; public IntPtr hwnd; public uint dwFlags;
        public uint uCount; public uint dwTimeout;
    }

    public static class WindowFlasherUxer
    {
        [DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        private static extern bool FlashWindowEx(ref FLASHWINFO pwfi);

        public const uint FLASHW_ALL = 3;      // タスクバーとウィンドウ両方
        public const uint FLASHW_TIMERNOFG = 12; // 最前面に来るまで点滅し続ける

        public static void Flash(IntPtr hWnd)
        {
            FLASHWINFO fInfo = new FLASHWINFO();
            fInfo.cbSize = Convert.ToUInt32(Marshal.SizeOf(fInfo));
            fInfo.hwnd = hWnd;
            fInfo.dwFlags = FLASHW_ALL | FLASHW_TIMERNOFG;
            fInfo.uCount = uint.MaxValue; // 無限に点滅
            fInfo.dwTimeout = 0;
            FlashWindowEx(ref fInfo);
        }
    }
}