using WMI to monitor printer usage

Question

I have the code below.I want to make sure that everytime a print job is finished the total number of pages printed and the owner of the document is stored in a databases.How do i make sure this is done .i have creted an event watcher that shows every print job on a printer.how can i save the total number of pages printed after the event has been detected and the print job is finished



using System;
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Management;
class WMIEvent {
public static void Main() {
WMIEvent we = new WMIEvent();
ManagementEventWatcher w= null;
WqlEventQuery q;
ManagementOperationObserver observer = new ManagementOperationObserver();
// Bind to local machine
ManagementScope scope = new ManagementScope("root\\CIMV2");
// scope.Options.EnablePrivileges = true; //sets required privilege
try {
q = new WqlEventQuery();
q.EventClassName = "__InstanceOperationEvent";
q.Condition = @"TargetInstance ISA 'Win32_PrintJob'";
q.WithinInterval = new TimeSpan(0,0,10);
w = new ManagementEventWatcher(scope, q);
w.EventArrived += new EventArrivedEventHandler(we.PrJobEventArrived);
w.Start();
Console.ReadLine(); // Block this thread - Press enter to terminate
w.Stop();
}
catch(Exception e) {
Console.WriteLine(e);
}
}

public void PrJobEventArrived(object sender, EventArrivedEventArgs e) {
//Get the Event object and display all properies
foreach(PropertyData pd in e.NewEvent.Properties) {
Console.WriteLine("\n======================================");
Console.WriteLine("{0},{1},{2}, {3}",pd.Name, pd.Type, pd.Value,
pd.Origin);
ManagementBaseObject mbo = null;
if(( mbo = pd.Value as ManagementBaseObject) != null) {
Console.WriteLine("--------------Properties------------------");
foreach(PropertyData prop in mbo.Properties)
Console.WriteLine("{0} - {1}", prop.Name, prop.Value);
}
}
}
}