Need help with a count down timer

Code:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WindowsApplication1
{
    public partial class form1 : Form
    {
        public form1()
        {
            InitializeComponent();
        }

        private void form1_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            int count = 1;



            if (count == 1)
            {
                System.Diagnostics.Process.Start("explorer.exe");   //start explorer
                count++; // increment count by 1 to skip starting explorer next time.

                // this.Visible = false;
                this.label1.Visible = false;  // get rid of the label telling you your session will start when you hit 'Accept'

                CountDown(); // start the counter

            }

        }



        private void button1_MouseEnter(object sender, EventArgs e)
        {
            button1.BackColor = Color.FromArgb(240, 240, 240);
        }

        private void button1_MouseLeave(object sender, EventArgs e)
        {
            button1.BackColor = Color.FromArgb(192, 192, 255);
        }

        private void button2_MouseEnter(object sender, EventArgs e)
        {
            button2.BackColor = Color.FromArgb(240, 240, 240);
        }

        private void button2_MouseLeave(object sender, EventArgs e)
        {
            button2.BackColor = Color.FromArgb(192, 192, 255);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            System.Diagnostics.Process.Start("shutdown", "-r");  // Shutdown system. ending patron session
            this.Close();
        }

        private void pictureBox1_Click(object sender, EventArgs e)
        {

        }


        private void CountDown()
        {





        }

        private void DisplayMethod()
        {

        }

        private void form1_Click(object sender, EventArgs e)
        {
            this.Close();
        } // this is for safty to kill the application at any time durning testing

      

        }
    }

As you can see, after hitting button1 for the first time, we will jump to a CountDown() method, which I originaly planed on using to put my timer code in to keep things clean.

I have looked on MSDN, for timer: http://search.msdn.microsoft.com/sea...=0&query=timer

but there was so much there, I didn't know where to really start, I also tryed google, with confusing results.

It's prob not as hard as I'm making it. I wanted this timer to count down from 30 min. Can someone *please* help me get started with a timer that would count down 30 min?

EDIT: ok, this is what I have for my timer so far http://www.nomorepasting.com/paste.php?pasteID=64923 when I set int StartTime = 900; my program does its disapearing thing for exactly 9 secounds... but when I set int StartTime = 1000; my program only does its thing for 6 secounds... wierd or what? I have the alarm component interval set to 1