Program to change windows 7 computername, username and password

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

namespace Computernaam
{
    public partial class Form1 : Form
    {
       
        ObjectQuery oQuery = new System.Management.ObjectQuery("select 
        MACAddress, IPAddress from Win32_NetworkAdapterConfiguration");
        ManagementObjectSearcher oSearcher = new ManagementObjectSearcher(oQuery);
        ManagementObjectCollection oObjColl = oSearcher.Get();

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            
        }

        
    }
}