Change system date programmatically

by

Here is where I found the answer.; I have reposted it here to improve clarity.

Define this structure:

[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;
}

Add the following extern method to your class:

[DllImport("kernel32.dll", SetLastError = true)]
public static extern bool SetSystemTime(ref SYSTEMTIME st);

Then call the method with an instance of your struct like this:

SYSTEMTIME st = new SYSTEMTIME();
st.wYear = 2009; // must be short
st.wMonth = 1;
st.wDay = 1;
st.wHour = 0;
st.wMinute = 0;
st.wSecond = 0;

SetSystemTime(ref st); // invoke this method.

More Related Contents:

  1. How can we obtain date time format in yyyy.MM.dd [duplicate]
  2. How do I get the correct time in C#
  3. Days between two dates in asp.net
  4. Calculate relative time in C#
  5. Algorithm to detect overlapping periods [duplicate]
  6. Displaying the build date
  7. How to get only time from date-time C# [closed]
  8. How do I represent a time only value in .NET?
  9. How to change time in DateTime?
  10. A type for Date only in C# – why is there no Date type?
  11. Convert DateTime to Julian Date in C# (ToOADate Safe?)
  12. Difference between System.DateTime.Now and System.DateTime.Today
  13. Count number of Mondays in a given date range
  14. Datetime in C# add days
  15. C# Datetimes: Conversion for different time zones
  16. Random date in C#
  17. Parse a string containing date and time in a custom format
  18. Specify Date format in MVC5 (dd/MM/yyyy)
  19. Convert DateTime to Date string “dd/mm/yyyy”
  20. Get the correct week number of a given date
  21. What does “DateTime?” mean in C#?
  22. How can I “pretty print” a Duration in Java?
  23. What’s a good way to overwrite DateTime.Now during testing?
  24. DateTime and CultureInfo
  25. How do I get modified date from file in C# on Windows Mobile?
  26. How frequent is DateTime.Now updated ? or is there a more precise API to get the current time?
  27. How can i format 07/03/2012 to March 7th,2012 in c# [duplicate]
  28. Get the exact time for a remote server
  29. Convert Date from Persian to Gregorian
  30. Datetime format Issue: String was not recognized as a valid DateTime

Leave a Comment