视频直播系统源码，实例源码系列-设置系统时间

public partial class Form1 : Form<br>{<br>    public Form1()<br>    {<br>        InitializeComponent();<br>    }<br>    //api函数声明   <br>    [DllImport("kernel32.dll", CharSet = CharSet.Ansi)]<br>    public extern static bool SetSystemTime(ref SYSTEMTIME time); <br>    [StructLayout(LayoutKind.Sequential)]<br>    public struct SYSTEMTIME<br>    {<br>        public short Year;<br>        public short Month;<br>        public short DayOfWeek;<br>        public short Day;<br>        public short Hour;<br>        public short Minute;<br>        public short Second;<br>        public short Miliseconds;<br>    }<br>    private void timer1_Tick(object sender, EventArgs e)<br>    {<br>        lblNowTime.Text = DateTime.Now.ToString();<br>    }<br>    private void Form1_Load(object sender, EventArgs e)<br>    {<br>        lblNowTime.Text = DateTime.Now.ToString();<br>        Microsoft.Win32.SystemEvents.TimeChanged+=new EventHandler(SystemEvents_TimeChanged);<br>    }<br>    private void SystemEvents_TimeChanged(object sender, EventArgs e)<br>    {<br>        MessageBox.Show("系统日期修改成功！","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);<br>    }<br>    private void button1_Click(object sender, EventArgs e)<br>    {<br>        mYear = monthCalendar1.SelectionRange.Start.Year;<br>        mMonth = monthCalendar1.SelectionRange.Start.Month;<br>        mDay = monthCalendar1.SelectionRange.Start.Day;<br>        //调用代码   <br>        SYSTEMTIME t = new SYSTEMTIME();<br>        t.Year = (short)mYear;<br>        t.Month = (short)mMonth;<br>        t.Day = (short)mDay;<br>        t.Hour = (short)(dateTimePicker1.Value.Hour - 8);//这个函数使用的是0时区的时间,例如，要设12点，则为12-8   <br>        t.Minute = (short)dateTimePicker1.Value.Minute;<br>        t.Second = (short)dateTimePicker1.Value.Second;<br>        bool v = SetSystemTime(ref t);   <br>    }<br>    int mYear;<br>    int mDay;<br>    int mMonth;<br>    private void monthCalendar1_DateSelected(object sender, DateRangeEventArgs e)<br>    {<br>        mYear = e.Start.Year;<br>        mMonth = e.Start.Month;<br>        mDay =e.Start.Day;<br>    }<br>    private void button2_Click(object sender, EventArgs e)<br>    {<br>        Application.Exit();<br>    }<br>}

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