Timer update image

Hello
Over to the next problem; how do i update the image one time per second?

The timer is working, but when i complie it says to me that i have to use EventHandler() instead of directly MainBox.Refresh(), so how do i do one void/subclass or something that i could use "MainBox.Refresh()" in?

Thanks a lot for the previous answers!

Code:

#region using

using System;
using System.Drawing;
using System.Windows.Forms;
using System.IO;
using System.Net;

#endregion

public class MainsClass
{
	
	public static void Main()
	{
		
		new InterfaceClass();
		
	}
	
}

public class InterfaceClass
{
	public InterfaceClass()
	{
		Form MainWindow = new Form();
		PictureBox MainBox = new PictureBox();
				
		MainWindow.Text = "Segel Kamera";
		MainWindow.StartPosition = FormStartPosition.CenterScreen;
		MainWindow.Width = 640;
		MainWindow.Height = 480;
		
		WebRequest reg = WebRequest.Create("http://raceoffice.segel.aland.fi:81/record/current.jpg");
		Stream stream = reg.GetResponse().GetResponseStream();
		
		Bitmap img = new Bitmap(stream);
		
		MainBox.BackgroundImage = img;
		MainBox.Width = 640;
		MainBox.Height = 480;
		MainBox.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
		
		Timer MainTimer = new Timer();
		MainTimer.Interval = 1000;
		MainTimer.Start();
		MainTimer.Tick += MainBox.Refresh();
		
		MainWindow.Controls.Add(MainBox);
		MainWindow.ShowDialog();
	}
}

Here's one way. I've used a Thread rather than a Timer:

Code:

using System;
using System.Drawing;
using System.Windows.Forms;
using System.IO;
using System.Net;
using System.Threading;

public class MainsClass
{
	
	public static void Main()
	{
		
		new InterfaceClass();
		
	}
	
}

public class InterfaceClass
{
	private Thread thread;
	private PictureBox MainBox;
	private delegate void CrossThreadOperationDelegate();

	public InterfaceClass()
	{
		Form MainWindow = new Form();
		MainBox = new PictureBox();
				
		MainWindow.Text = "Segel Kamera";
		MainWindow.StartPosition = FormStartPosition.CenterScreen;
		MainWindow.Width = 640;
		MainWindow.Height = 480;
		
		MainBox.Width = 640;
		MainBox.Height = 480;
		MainBox.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
		
		MainWindow.Controls.Add(MainBox);
		MainWindow.ShowDialog();

		thread = new Thread(new ThreadStart(Worker));
		thread.Start();
	}

	private void Worker()
	{
		while (true)
		{
			Thread.Sleep(1000);
			UpdatePicture();
		}
	}

	private void UpdatePicture()
	{
		if (MainBox.InvokeRequired)
		{
			MainBox.BeginInvoke(new CrossThreadOperationDelegate(UpdatePicture));
		}
		else
		{
			WebRequest reg = WebRequest.Create("http://raceoffice.segel.aland.fi:81/record/current.jpg");
			Stream stream = reg.GetResponse().GetResponseStream();
			Bitmap img = new Bitmap(stream);
			MainBox.BackgroundImage = img;
		}
	}
}

Thank you!