Print Spool monitoring

I am trying to make an application that monitors my printer and when the user sends a print, of whatever program it is, it captures this information, pauses the print and opens a new window for the user to enter a code. If the code is correct it continues printing. Otherwise, printing is canceled.

At the moment I'm just trying to get the application to pause printing. I can get her to monitor the spool and return the job information submitted. But I can't pause printing (no error appears, I just can't find the necessary function for this. I've tried using InvokeMethod ("Pause") but it just appears that there is no such option).

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

namespace Listar_Servicos
{
    public partial class frmMonitor : Form
    {
        public frmMonitor()
        {
            InitializeComponent();
        }

        private void frmMonitor_Load(object sender, EventArgs e)
        {
            EventWatch("localhost");
        }

        private ManagementEventWatcher manEWatch;

            public void EventWatch(string host)
            {

                ManagementScope oMs = new ManagementScope(@"\\" + host + @"\root\cimv2");
                oMs.Connect();
                manEWatch = new ManagementEventWatcher(oMs, new EventQuery("SELECT * FROM    __InstanceCreationEvent WITHIN 0.1 WHERE TargetInstance ISA 'Win32_PrintJob'"));
                manEWatch.EventArrived += new EventArrivedEventHandler(mewPrintJobs_EventArrived);
                manEWatch.Start();
            }

            static void mewPrintJobs_EventArrived(object sender, EventArrivedEventArgs e)
            {
                foreach (PropertyData prop in e.NewEvent.Properties)
                {
                    string val = prop.Value == null ? "null" : prop.Value.ToString();

                }

                ManagementBaseObject printJob = (ManagementBaseObject)e.NewEvent.Properties["TargetInstance"].Value;
                string v = "";

                foreach (PropertyData propp in printJob.Properties)
                {

                    string name = propp.Name;
                    string val = propp.Value == null ? "null" : propp.Value.ToString();
                    val += "\n";
                    v += name + ":" + val;

                }
                MessageBox.Show(v);
            }

        private void btnNovoMonitor_Click(object sender, EventArgs e)
        {
            frmMonitor2 novoMonitor = new frmMonitor2();
            novoMonitor.Show();
        }
    }
}

Could anyone help me?