using System;
using System.Runtime.InteropServices;

namespace Muchinfo.MTPClient.Service
{


    public class GetLastInputInfoHelp
    {
        [DllImport("user32.dll")]
        internal static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);

        /// <summary> 
        /// 获取鼠标键盘不活动的时间 
        /// </summary> 
        /// <returns>结果</returns> 
        public static int GetLastInputTime()
        {
            LASTINPUTINFO lastInputInfo = new LASTINPUTINFO();
            lastInputInfo.cbSize = Marshal.SizeOf(lastInputInfo);
            lastInputInfo.dwTime = 0;

            int idleTime = 0;
            if (GetLastInputInfo(ref lastInputInfo))
            {
                idleTime = Environment.TickCount - lastInputInfo.dwTime;
            }

            return ((idleTime > 0) ? (idleTime / 1000) : 0);
        }

    }

    [StructLayout(LayoutKind.Sequential)]
    internal struct LASTINPUTINFO
    {
        [MarshalAs(UnmanagedType.U4)]
        public int cbSize;
        [MarshalAs(UnmanagedType.U4)]
        public int dwTime;
    }

}