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Change system date

How can we change/reset the system date.

Thanks in advance.
RC
Nov 21 '05 #1
2 4156
"Richard" <Ri*****@nospam .com> schrieb:
How can we change/reset the system date.


P/invoke on 'SetSystemTime' :

<URL:http://www.google.de/groups?selm=%23 adlX7%24fCHA.22 84%40tkmsftngp1 1>

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>
Nov 21 '05 #2
Here's a VB.NET solution to change system time:

Imports System.Runtime. InteropServices

<StructLayout(L ayoutKind.Seque ntial)> _
Public Structure SYSTEMTIME
Public wYear As Short
Public wMonth As Short
Public wDayOfWeek As Short
Public wDay As Short
Public wHour As Short
Public wMinute As Short
Public wSecond As Short
Public wMilliseconds As Short
End Structure

Private Declare Function SetSystemTime Lib "kernel32" (ByRef
lpSystemTime As SYSTEMTIME) As Integer
Private Declare Sub GetSystemTime Lib "kernel32" Alias "GetSystemT ime"
(ByRef lpSystemTime As SYSTEMTIME)

Usage (SetSystemTime) :

Dim st As SYSTEMTIME
With st
.wDay = 1
.wMonth = 1
.wYear = 1981
.wMinute = 1
.wHour = 1
.wSecond = 0
End With
If SetSystemTime(s t) = 1 Then
MessageBox.Show ("System Time Changed")
Else
MessageBox.Show (Marshal.GetLas tWin32Error.ToS tring)
End If

Usage (GetSystemTime) :

Dim sysTime As SYSTEMTIME
GetSystemTime(s ysTime)
MessageBox.Show (sysTime.wHour. ToString())

Obviously, I am running under administration rights & you need to take this
into account if you are just a user.

I hope this helps
Nov 21 '05 #3

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