private static extern bool SetDynamicTimeZoneInformation([In] ref DynamicTimeZoneInformation lpTimeZoneInformation);
public static void Main(string[] args)
{
var regTimeZones = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Time Zones");
// Print out all the possible time-zones.
//foreach(var subKey in regTimeZones.GetSubKeyNames())
//{
// Console.WriteLine(subKey);
//}
var subKey = regTimeZones.GetSubKeyNames().Where(s => s == "Atlantic Standard Time").First();
string daylightName = (string)regTimeZones.OpenSubKey(subKey).GetValue("Dlt");
string standardName = (string)regTimeZones.OpenSubKey(subKey).GetValue("Std");
byte[] tzi = (byte[])regTimeZones.OpenSubKey(subKey).GetValue("TZI");
var regTzi = new RegistryTimeZoneInformation(tzi);
TokenPrivilegesAccess.EnablePrivilege("SeTimeZonePrivilege");
bool didSet;
if (Environment.OSVersion.Version.Major < 6)
{
var tz = new TimeZoneInformation();
tz.Bias = regTzi.Bias;
tz.DaylightBias = regTzi.DaylightBias;
tz.StandardBias = regTzi.StandardBias;
tz.DaylightDate = regTzi.DaylightDate;
tz.StandardDate = regTzi.StandardDate;
tz.DaylightName = daylightName;
tz.StandardName = standardName;
didSet = Program.SetTimeZoneInformation(ref tz);
}
else
{
var tz = new DynamicTimeZoneInformation();
tz.Bias = regTzi.Bias;
tz.DaylightBias = regTzi.DaylightBias;
tz.StandardBias = regTzi.StandardBias;
tz.DaylightDate = regTzi.DaylightDate;
tz.StandardDate = regTzi.StandardDate;
tz.DaylightName = daylightName;
tz.StandardName = standardName;
tz.TimeZoneKeyName = subKey;
tz.DynamicDaylightTimeDisabled = false;
didSet = Program.SetDynamicTimeZoneInformation(ref tz);
}
int lastError = Marshal.GetLastWin32Error();
TokenPrivilegesAccess.DisablePrivilege("SeTimeZonePrivilege");
if (didSet)
{
Console.WriteLine("Success, TimeZone Set!");
}
else
{
if (lastError == Program.ERROR_ACCESS_DENIED)
{
Console.WriteLine("Error: Access denied... Try running application as administrator.");
}
else if (lastError == Program.CORSEC_E_MISSING_STRONGNAME)
{
Console.WriteLine("Error: Application is not signed ... Right click the project > Signing > Check 'Sign the assembly'.");
}
else
{
Console.WriteLine("Win32Error: " + lastError + "\nHRESULT: " + Marshal.GetHRForLastWin32Error());
}
}
Console.ReadLine();
}
public static void ChangeTimeZone(int timeZoneOffset, bool refreshLive)
{
var regTimeZones = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Time Zones");
// Print out all the possible time-zones.
foreach (var sKey in regTimeZones.GetSubKeyNames())
{
Console.WriteLine(sKey);
}
string timeZoneName = timeZoneNames[timeZoneOffset];
var subKey = regTimeZones.GetSubKeyNames().Where(s => s == timeZoneName).First();
string daylightName = (string)regTimeZones.OpenSubKey(subKey).GetValue("Dlt");
string standardName = (string)regTimeZones.OpenSubKey(subKey).GetValue("Std");
byte[] tzi = (byte[])regTimeZones.OpenSubKey(subKey).GetValue("TZI");
var regTzi = new RegistryTimeZoneInformation(tzi);
TokenPrivilegesAccess.EnablePrivilege("SeTimeZonePrivilege");
bool didSet;
if (Environment.OSVersion.Version.Major < 6)
{
var tz = new TimeZoneInformation();
tz.Bias = regTzi.Bias;
tz.DaylightBias = regTzi.DaylightBias;
tz.StandardBias = regTzi.StandardBias;
tz.DaylightDate = regTzi.DaylightDate;
tz.StandardDate = regTzi.StandardDate;
tz.DaylightName = daylightName;
tz.StandardName = standardName;
didSet = TimeZoneControl.SetTimeZoneInformation(ref tz);
}
else
{
var tz = new DynamicTimeZoneInformation();
tz.Bias = regTzi.Bias;
tz.DaylightBias = regTzi.DaylightBias;
tz.StandardBias = regTzi.StandardBias;
tz.DaylightDate = regTzi.DaylightDate;
tz.StandardDate = regTzi.StandardDate;
tz.DaylightName = daylightName;
tz.StandardName = standardName;
tz.TimeZoneKeyName = subKey;
tz.DynamicDaylightTimeDisabled = false;
didSet = TimeZoneControl.SetDynamicTimeZoneInformation(ref tz);
}
int lastError = Marshal.GetLastWin32Error();
TokenPrivilegesAccess.DisablePrivilege("SeTimeZonePrivilege");
if (didSet)
{
Console.WriteLine("Success, TimeZone Set!");
}
else
{
if (lastError == TimeZoneControl.ERROR_ACCESS_DENIED)
{
//Console.WriteLine("Error: Access denied... Try running application as administrator.");
}
else if (lastError == TimeZoneControl.CORSEC_E_MISSING_STRONGNAME)
{
//Console.WriteLine("Error: Application is not signed ... Right click the project > Signing > Check 'Sign the assembly'.");
}
else
{
//Console.WriteLine("Win32Error: " + lastError + "\nHRESULT: " + Marshal.GetHRForLastWin32Error());
}
}
TimeZoneInfo.ClearCachedData();
if (refreshLive)
{
if (Mediator != null)
{
Mediator.SendMessage(true, MsgTag.Refresh);
}
}
//Console.ReadLine();
}
