Applications list in c#

public partial class Form1 : Form
    {
        public System.Management.ManagementEventWatcher mgmtWtch;

        public Form1()
        {
            InitializeComponent();
            mgmtWtch = new System.Management.ManagementEventWatcher("Select * From Win32_ProcessStartTrace");
            mgmtWtch.EventArrived += new System.Management.EventArrivedEventHandler(mgmtWtch_EventArrived);
            mgmtWtch.Start();
        }

        private void mgmtWtch_EventArrived(object sender, System.Management.EventArrivedEventArgs e)
        {
            MessageBox.Show((string)e.NewEvent["ProcessName"]);
        }       
    }