C#

<br />
void event1(...) {<br />
   //this event is called first<br />
   method1()<br />
   //more stuff<br />
}<br />
<br />
public void method1() {<br />
   //some stuff<br />
   method2();<br />
   //more stuff<br />
}<br />
<br />
public void method2() {<br />
   //some stuff<br />
   method3();<br />
   //more stuff<br />
}<br />
<br />
public void method3() {<br />
   //some stuff<br />
   if (x == 0) {<br />
      //now exit<br />
      //????????<br />
   }<br />
   //more stuff<br />
}<br />
<br />

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.Management;

namespace WMIPrinter
{
  class Program
  {
    static void Main(string[] args)
    {
      Thread t = new Thread(new ThreadStart(Go));
      t.Start();
    }

    private static void Go()
    {      
      while (true)
      {
        Thread.Sleep(60000);

        try
        {
          ManagementObjectSearcher searcher =
              new ManagementObjectSearcher("root\\CIMV2",
              "SELECT DriverVersion FROM Win32_PrinterConfiguration WHERE Name=\"HP Color LaserJet 4550 PCL\"");

          foreach (ManagementObject queryObj in searcher.Get())
          {
            Console.WriteLine("DriverVersion: {0}", queryObj["DriverVersion"]);
          }

          searcher.Dispose();
        }
        catch (ManagementException e)
        {
          Console.WriteLine("### EXCEPTION: " + e.Message);
        }
      }
    }
  }
}