using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace BiskLog_Point_Of_Sale.Classes
{
   public class lastIdle
    {
        [StructLayout(LayoutKind.Sequential)]
        struct LASTINPUTINFO
        {
            public static readonly int SizeOf = Marshal.SizeOf(typeof(LASTINPUTINFO));

            [MarshalAs(UnmanagedType.U4)]
            public int cbSize;
            [MarshalAs(UnmanagedType.U4)]
            public UInt32 dwTime;
        }

        [DllImport("user32.dll")]
        static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);
        public static int GetLastInputTime()
        {
            int nIdleTime = 0;
            LASTINPUTINFO liiInfo = new LASTINPUTINFO();
            liiInfo.cbSize = Marshal.SizeOf(liiInfo);
            liiInfo.dwTime = 0;
            int nEnvTicks = Environment.TickCount;
            if (GetLastInputInfo(ref liiInfo))
            {
                int nLastInputTick = int.Parse(liiInfo.dwTime.ToString());
                nIdleTime = nEnvTicks - nLastInputTick;
            }
            return ((nIdleTime > 0) ? (nIdleTime / 1000) : nIdleTime);
        }
    }
}