[StructLayout(LayoutKind.Sequential)]
public struct SYSTEMTIME
{
public short wYear;
public short wMonth;
public short wDayOfWeek;
public short wDay;
public short wHour;
public short wMinute;
public short wSecond;
public short wMilliseconds;
}
[DllImport("kernel32.dll", SetLastError=true)]
public static extern bool SetSystemTime( [In] ref SYSTEMTIME st );
SYSTEMTIME st = new SYSTEMTIME();
st.wYear = 2003; // must be short
st.wMonth = 5;
st.wDay = 22;
st.wHour = 0;
st.wMinute = 0;
st.wSecond = 0;
SetSystemTime(ref st);