设置系统任务栏时间

实现效果:

　　

知识运用：

　　API函数SetSystemTime

实现代码：

        [DllImport("kernel32.dll", CharSet = CharSet.Ansi)]
        public extern static bool SetSystemTime(ref SYSTEMTIME IpSystemTime);
        [StructLayout(LayoutKind.Sequential)]
        public struct SYSTEMTIME
        {
            public short Year; public short Month; public short DayOfWeek; public short Day;
            public short Hour; public short Minute; public short Second; public short Miliseconds;
        }
        int mYear;
        int mMonth;
        int mDay;
        private void monthCalendar1_DateSelected(object sender, DateRangeEventArgs e)
        {
            mYear = e.Start.Year;
            mMonth = e.Start.Month;
            mDay = e.Start.Day;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            mYear = monthCalendar1.SelectionRange.Start.Year;
            mMonth = monthCalendar1.SelectionRange.Start.Month;
            mDay = monthCalendar1.SelectionRange.Start.Day;
            SYSTEMTIME t = new SYSTEMTIME();
            t.Year =(short) mYear;
            t.Month = (short)mMonth;
            t.Day = (short)mDay;
            t.Hour = (short)(dateTimePicker1.Value.Hour-8); //系统默认UTC时间 要减8
            t.Minute = (short)dateTimePicker1.Value.Minute;
            t.Second = (short)dateTimePicker1.Value.Second;
            SetSystemTime(ref t);
        }