获取和设置系统时间

    /// <summary>
    /// import WINDOWS DLL
    /// </summary>
    public class Win32
    {
        /// <summary>
        /// 系统时间
        /// 格林尼治时间
         /// </summary>
        /// <param name="sysTime">系统时间</param>
        /// <returns>系统时间</returns>
        [DllImport("Kernel32.dll")]
        public static extern bool SetSystemTime(ref SystemTime sysTime);

        /// <summary>
        /// 本地时间
        /// </summary>
        /// <param name="sysTime">系统时间</param>
        /// <returns>系统时间</returns>
        [DllImport("Kernel32.dll")]
        public static extern bool SetLocalTime(ref SystemTime sysTime);

        /// <summary>
        /// 获取系统时间
        /// </summary>
        /// <param name="sysTime">系统时间</param>
        [DllImport("Kernel32.dll")]
        public static extern void GetSystemTime(ref SystemTime sysTime);

        /// <summary>
        /// 获取本地时间
        /// </summary>
        /// <param name="sysTime">本地时间</param>
        [DllImport("Kernel32.dll")]
        public static extern void GetLocalTime(ref SystemTime sysTime);

        /// <summary>
        /// 系统时间
        /// </summary>
        [StructLayout(LayoutKind.Sequential)]
        public struct SystemTime
        {
            /// <summary>
            /// 年
            /// </summary>
            public ushort wYear;

            /// <summary>
            /// 月
            /// </summary>
            public ushort wMonth;

            /// <summary>
            /// 週
            /// </summary>
            public ushort wDayOfWeek;

            /// <summary>
            /// 日
            /// </summary>
            public ushort wDay;

            /// <summary>
            /// 時
            /// </summary>
            public ushort wHour;

            /// <summary>
            /// 分
            /// </summary>
            public ushort wMinute;

            /// <summary>
            /// 秒
            /// </summary>
            public ushort wSecond;
            
            /// <summary>
            /// 刻度
            /// </summary>   
            public ushort wMiliseconds;
        }
    }