@msdn=http://search.microsoft.com/search/results.aspx?qu=$$$ @pinvoke=http://pinvoke.net/$$$.htm Summary: Sets the date and time on the system. !!!!C# Signature: [DllImport("coredll.dll", SetLastError=true)] static extern bool SetSystemTime(ref SYSTEMTIME time); !!!!VB Signature: <DllImport("coredll.dll")> _ Private Shared Function SetSystemTime(ByRef time As SYSTEMTIME) As Boolean End Function !!!!User-Defined Types C#: public struct SYSTEMTIME { public short year; public short month; public short dayOfWeek; public short day; public short hour; public short minute; public short second; public short milliseconds; } !!!!User-Defined Types VB: Private Structure SYSTEMTIME Public Year As Short Public Month As Short Public DayOfWeek As Short Public Day As Short Public Hour As Short Public Minute As Short Public Second As Short Public Milliseconds As Short End Structure !!!!Notes: This function sets the system time ignoring locale settings and summer time. To set the date and time with consideration to the locale settings use SetLocalTime. !!!!Tips & Tricks: Please add some! !!!!Sample Code: Imports System.Runtime.InteropServices Public Class Form1 Inherits System.Windows.Forms.Form Friend WithEvents Button1 As System.Windows.Forms.Button Friend WithEvents MainMenu1 As System.Windows.Forms.MainMenu #Region " Windows Form Designer generated code " Public Sub New() MyBase.New() 'This call is required by the Windows Form Designer. InitializeComponent() 'Add any initialization after the InitializeComponent() call End Sub 'Form overrides dispose to clean up the component list. Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) MyBase.Dispose(disposing) End Sub 'NOTE: The following procedure is required by the Windows Form Designer 'It can be modified using the Windows Form Designer. 'Do not modify it using the code editor. Private Sub InitializeComponent() Me.MainMenu1 = New System.Windows.Forms.MainMenu Me.Button1 = New System.Windows.Forms.Button ' 'Button1 ' Me.Button1.Location = New System.Drawing.Point(56, 160) Me.Button1.Size = New System.Drawing.Size(128, 64) Me.Button1.Text = "Button1" ' 'Form1 ' Me.Controls.Add(Me.Button1) Me.Menu = Me.MainMenu1 Me.Text = "Form1" End Sub #End Region Private Structure SYSTEMTIME Public Year As Short Public Month As Short Public DayOfWeek As Short Public Day As Short Public Hour As Short Public Minute As Short Public Second As Short Public Milliseconds As Short End Structure <DllImport("coredll.dll")> _ Private Shared Function SetSystemTime(ByRef time As SYSTEMTIME) As Boolean End Function Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim idag As DateTime = Now().AddHours(1).AddMinutes(2).ToUniversalTime Dim s As New SYSTEMTIME s.Year = idag.Year s.Month = idag.Month s.DayOfWeek = idag.DayOfWeek s.Day = idag.Day s.Hour = idag.Hour s.Minute = idag.Minute s.Second = idag.Second s.Milliseconds = idag.Millisecond SetSystemTime(s) End Sub End Class C# Sample Code using System.Runtime.InteropServices; public class Form1 : System.Windows.Forms.Form { internal System.Windows.Forms.Button Button1; internal System.Windows.Forms.MainMenu MainMenu1; #region " Windows Form Designer generated code " public Form1() : base() { //This call is required by the Windows Form Designer. InitializeComponent(); //Add any initialization after the InitializeComponent() call } //Form overrides dispose to clean up the component list. protected override void Dispose(bool disposing) { base.Dispose(disposing); } //NOTE: The following procedure is required by the Windows Form Designer //It can be modified using the Windows Form Designer. //Do not modify it using the code editor. private void InitializeComponent() { this.MainMenu1 = new System.Windows.Forms.MainMenu(); this.Button1 = new System.Windows.Forms.Button(); // //Button1 // this.Button1.Location = new System.Drawing.Point(56, 160); this.Button1.Size = new System.Drawing.Size(128, 64); this.Button1.Text = "Button1"; // //Form1 // this.Controls.Add(this.Button1); this.Menu = this.MainMenu1; this.Text = "Form1"; } #endregion private struct SYSTEMTIME { public short Year; public short Month; public short DayOfWeek; public short Day; public short Hour; public short Minute; public short Second; public short Milliseconds; } [DllImport("coredll.dll")] private static extern bool SetSystemTime(ref SYSTEMTIME time); private void Button1_Click(object sender, System.EventArgs e) { DateTime idag = Now().AddHours(1).AddMinutes(2).ToUniversalTime(); SYSTEMTIME s = new SYSTEMTIME(); s.Year = (short)idag.Year; s.Month = (short)idag.Month; s.DayOfWeek = (short)idag.DayOfWeek; s.Day = (short)idag.Day; s.Hour = (short)idag.Hour; s.Minute = (short)idag.Minute; s.Second = (short)idag.Second; s.Milliseconds = (short)idag.Millisecond; SetSystemTime(ref s); } } !!!!Alternative Managed API: Do you know one? Please contribute it! Documentation: SetSystemTime@msdn on MSDN
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