SafeWaitHandle - есть такая функция? Как её использовать?

ItemInfo itemInfo = (ItemInfo)item.Tag;
string videoPath = itemInfo.Path;
Options options = itemInfo.Options;
int tileCount = Int32.Parse(item.SubItems[0].Text);
AutoResetEvent activityEvent = new AutoResetEvent(false);
AutoResetEvent finishedEvent = new AutoResetEvent(false);
Process workProc = null;
 
options.SaveOptions(Path.Combine(Settings.SettingsDirectory, "OptionsBatch.grb"));
 
activityEvent.SafeWaitHandle = new SafeWaitHandle(NativeMethods.CreateEvent(
    IntPtr.Zero, false, false, "IGBatchActivity"), true);
finishedEvent.SafeWaitHandle = new SafeWaitHandle(NativeMethods.CreateEvent(
    IntPtr.Zero, false, false, "IGBatchFinished"), true);
 
try {
    workProc = Process.Start(Assembly.GetExecutingAssembly().Location,
        String.Format("-batch {0} "{1}"", tileCount, videoPath));
    int lastRespondTime = Environment.TickCount;
    bool finished = false;
 
    do {
        if (activityEvent.WaitOne(100, false)) {
            lastRespondTime = Environment.TickCount;
        }
    }
    while ((Environment.TickCount - lastRespondTime < timeout) &&
        !(finished = finishedEvent.WaitOne(100, false)));
 
    if (!finished) {
        workProc.Kill();
    }
}
catch { }
finally {
    if (workProc != null) {
        try {
            workProc.Dispose();
        }
        catch { }
    }
    activityEvent.Close();
    finishedEvent.Close();
}
 
Application.DoEvents();

# Помещаем в переменную $Code код c#
$Code = @"
 using System;
 using System.Runtime.InteropServices;
 
namespace ImageGrabberII {
  public class Magic {
    [DllImport("kernel32.dll")]
    static extern IntPtr CreateEvent(IntPtr lpEventAttributes, bool bManualReset, bool bInitialState, string lpName);
    public static void DoMagic() { 
      CreateEvent(IntPtr.Zero, false, false, "IGBatchFinished"); 
      CreateEvent(IntPtr.Zero, false, false, "IGBatchActivity");
    }
  }
}
"@
 
# комилируем и выполняем
$cp = new-object Microsoft.CSharp.CSharpCodeProvider        
$cpar = New-Object System.CodeDom.Compiler.CompilerParameters
$cp.CompileAssemblyFromSource($cpar, $code)
[ImageGrabberII.Magic]::DoMagic()