设置PDA系统日期时间

using System;
using System.Runtime.InteropServices;

namespace setlocaltime
{
class Systemtime
{
[DllImport("coredll.dll")]
public static extern bool SetLocalTime(ref SYSTEMTIME Time);
[DllImport("coredll.dll")]
public static extern void GetLocalTime(ref SYSTEMTIME Time);
}
public struct SYSTEMTIME
{
public ushort wYear;
public ushort wMonth;
public ushort wDayOfWeek;
public ushort wDay;
public ushort wHour;
public ushort wMinute;
public ushort wSecond;
public ushort wMilliseconds;

/// <summary>
/// 从System.DateTime转换。
/// </summary>
/// <param name="time">System.DateTime类型的时间。</param>
public void FromDateTime(DateTime time)
{
wYear = (ushort)time.Year;
wMonth = (ushort)time.Month;
wDayOfWeek = (ushort)time.DayOfWeek;
wDay = (ushort)time.Day;
wHour = (ushort)time.Hour;
wMinute = (ushort)time.Minute;
wSecond = (ushort)time.Second;
wMilliseconds = (ushort)time.Millisecond;
}
/// <summary>
/// 转换为System.DateTime类型。
/// </summary>
/// <returns></returns>
public DateTime ToDateTime()
{
return new DateTime(wYear, wMonth, wDay, wHour, wMinute, wSecond, wMilliseconds);
}
/// <summary>
/// 静态方法。转换为System.DateTime类型。
/// </summary>
/// <param name="time">SYSTEMTIME类型的时间。</param>
/// <returns></returns>
public static DateTime ToDateTime(SYSTEMTIME time)
{
return time.ToDateTime();
}

}
}