Here is some code I happen to have lying around - not production quality but
a good sample:
using System;
using System.Drawing;
using System.Collections;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
using System.Diagnostics;
namespace SetSystemTime
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Panel panel1;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.Panel panel2;
private System.Windows.Forms.Label label4;
private System.Windows.Forms.Label label5;
private System.Windows.Forms.Label label6;
private System.Windows.Forms.Label lblOriginalLocal;
private System.Windows.Forms.Label lblOriginalUtc;
private System.Windows.Forms.Label lblNewLocal;
private System.Windows.Forms.Label lblNewUtc;
private System.Windows.Forms.MainMenu mainMenu1;
public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.mainMenu1 = new System.Windows.Forms.MainMenu();
this.button1 = new System.Windows.Forms.Button();
this.panel1 = new System.Windows.Forms.Panel();
this.label1 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.label3 = new System.Windows.Forms.Label();
this.panel2 = new System.Windows.Forms.Panel();
this.label4 = new System.Windows.Forms.Label();
this.label5 = new System.Windows.Forms.Label();
this.label6 = new System.Windows.Forms.Label();
this.lblOriginalLocal = new System.Windows.Forms.Label();
this.lblOriginalUtc = new System.Windows.Forms.Label();
this.lblNewLocal = new System.Windows.Forms.Label();
this.lblNewUtc = new System.Windows.Forms.Label();
//
// button1
//
this.button1.Location = new System.Drawing.Point(160, 240);
this.button1.Text = "button1";
this.button1.Click += new
System.EventHandler(this.button1_Click);
//
// panel1
//
this.panel1.BackColor = System.Drawing.Color.Silver;
this.panel1.Controls.Add(this.lblOriginalUtc);
this.panel1.Controls.Add(this.lblOriginalLocal);
this.panel1.Controls.Add(this.label3);
this.panel1.Controls.Add(this.label2);
this.panel1.Controls.Add(this.label1);
this.panel1.Location = new System.Drawing.Point(0, 8);
this.panel1.Size = new System.Drawing.Size(240, 100);
//
// label1
//
this.label1.Font = new System.Drawing.Font("Tahoma", 9F,
System.Drawing.FontStyle.Regular);
this.label1.Location = new System.Drawing.Point(8, 32);
this.label1.Size = new System.Drawing.Size(136, 20);
this.label1.Text = "Local";
//
// label2
//
this.label2.Font = new System.Drawing.Font("Tahoma", 9F,
System.Drawing.FontStyle.Regular);
this.label2.Location = new System.Drawing.Point(8, 64);
this.label2.Size = new System.Drawing.Size(136, 20);
this.label2.Text = "UTC";
//
// label3
//
this.label3.Location = new System.Drawing.Point(0, 8);
this.label3.Text = "Original Time";
//
// panel2
//
this.panel2.BackColor = System.Drawing.Color.Silver;
this.panel2.Controls.Add(this.lblNewUtc);
this.panel2.Controls.Add(this.lblNewLocal);
this.panel2.Controls.Add(this.label4);
this.panel2.Controls.Add(this.label5);
this.panel2.Controls.Add(this.label6);
this.panel2.Location = new System.Drawing.Point(0, 120);
this.panel2.Size = new System.Drawing.Size(240, 100);
//
// label4
//
this.label4.Location = new System.Drawing.Point(0, 8);
this.label4.Text = "New Time";
//
// label5
//
this.label5.Font = new System.Drawing.Font("Tahoma", 9F,
System.Drawing.FontStyle.Regular);
this.label5.Location = new System.Drawing.Point(8, 64);
this.label5.Size = new System.Drawing.Size(136, 20);
this.label5.Text = "UTC";
//
// label6
//
this.label6.Font = new System.Drawing.Font("Tahoma", 9F,
System.Drawing.FontStyle.Regular);
this.label6.Location = new System.Drawing.Point(8, 32);
this.label6.Size = new System.Drawing.Size(136, 20);
this.label6.Text = "Local";
//
// lblOriginalLocal
//
this.lblOriginalLocal.Location = new System.Drawing.Point(152,
32);
this.lblOriginalLocal.Size = new System.Drawing.Size(80, 20);
//
// lblOriginalUtc
//
this.lblOriginalUtc.Font = new System.Drawing.Font("Tahoma", 9F,
System.Drawing.FontStyle.Regular);
this.lblOriginalUtc.Location = new System.Drawing.Point(152,
64);
this.lblOriginalUtc.Size = new System.Drawing.Size(80, 20);
//
// lblNewLocal
//
this.lblNewLocal.Font = new System.Drawing.Font("Tahoma", 9F,
System.Drawing.FontStyle.Regular);
this.lblNewLocal.Location = new System.Drawing.Point(152, 32);
this.lblNewLocal.Size = new System.Drawing.Size(80, 20);
//
// lblNewUtc
//
this.lblNewUtc.Font = new System.Drawing.Font("Tahoma", 9F,
System.Drawing.FontStyle.Regular);
this.lblNewUtc.Location = new System.Drawing.Point(152, 64);
this.lblNewUtc.Size = new System.Drawing.Size(80, 20);
//
// Form1
//
this.Controls.Add(this.panel2);
this.Controls.Add(this.panel1);
this.Controls.Add(this.button1);
this.Menu = this.mainMenu1;
this.Text = "Form1";
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
static void Main()
{
Application.Run(new Form1());
}
public struct SystemTime
{
public ushort Year;
public ushort Month;
public ushort DayOfWeek;
public ushort Day;
public ushort Hour;
public ushort Minute;
public ushort Second;
public ushort Millisecond;
};
[DllImport("kernel32.dll", EntryPoint="GetSystemTime",
SetLastError=true)]
public extern static void Win32GetSystemTime(ref SystemTime st);
[DllImport("coredll.dll", EntryPoint="GetSystemTime",
SetLastError=true)]
public extern static void WinCEGetSystemTime(ref SystemTime st);
[DllImport("kernel32.dll", EntryPoint="SetSystemTime",
SetLastError=true)]
public extern static bool Win32SetSystemTime(ref SystemTime st);
[DllImport("coredll.dll", EntryPoint="SetSystemTime",
SetLastError=true)]
public extern static bool WinCESetSystemTime(ref SystemTime st);
private void button1_Click(object sender, System.EventArgs e)
{
try
{
SystemTime st = new SystemTime();
//WinCEGetSystemTime(ref st);
//st.Hour = 1;
//st.Minute = 30;
DateTime dt = DateTime.UtcNow;
this.lblOriginalUtc.Text = dt.ToShortTimeString();
st.Year = (ushort)dt.Year;
st.Month = (ushort)dt.Month;
st.Day = (ushort)dt.Day;
st.DayOfWeek = (ushort)dt.DayOfWeek;
st.Hour = (ushort)((dt.Hour + 1) % 24);
st.Minute = (ushort)dt.Minute;
st.Second = 59;
st.Millisecond = (ushort)dt.Millisecond;
this.lblOriginalLocal.Text =
dt.ToLocalTime().ToShortTimeString();
bool result = WinCESetSystemTime(ref st);
if (true != result)
{
int error = Marshal.GetLastWin32Error();
Debug.WriteLine(String.Format("SetSystemTime failed:
{0:X8}", error));
}
dt = DateTime.UtcNow;
this.lblNewUtc.Text = dt.ToShortTimeString();
this.lblNewLocal.Text =
dt.ToLocalTime().ToShortTimeString();
}
catch (Exception x)
{
Debug.WriteLine(x);
}
}
}
}
--
Geoff Schwab
Program Manager
Excell Data Corporation
http://msdn.com/mobility
http://msdn.microsoft.com/mobility/prodtechinfo/devtools/netcf/FAQ/default.aspx
This posting is provided "AS IS" with no warranties, and confers no rights.
