public class DocumentCollection : System.MarshalByRefObject 

using System;
using ZennoLab.CommandCenter;
 
namespace Sample
{
    internal class Example
    {
        public static int Execute(Instance instance)
        {
            instance.ClearCookie();
            
            Tab tab = instance.MainTab;
            if ((tab.IsVoid) || (tab.IsNull)) return -1;
            if (tab.IsBusy) tab.WaitDownloading();
            tab.Navigate("zennolab.com");
            if (tab.IsBusy) tab.WaitDownloading();
            
            DocumentCollection docCol = tab.AllDocuments;
            
            if ((docCol.ErrorDetected) || (docCol.IsVoid)) return -1;
            
            Document doc = null;
            
            for (int i = 0; i < docCol.Count; i++)
            {
                doc = docCol.Documents[i];
            }
            
            int index = docCol.IndexOf(doc);
            
            return 0;
        }
    }
}

<?php
namespace System;
namespace ZennoLab\CommandCenter;
 
class Example
{
    public static function Execute($instance)
    {
        $instance->ClearCookie();
            
        $tab = $instance->MainTab;
        if (($tab->IsVoid) || ($tab->IsNull)) return -1;
        if ($tab->IsBusy) $tab->WaitDownloading();
        $tab->Navigate("zennolab.com");
        if ($tab->IsBusy) $tab->WaitDownloading();
            
        $docCol = $tab->AllDocuments;
            
        if (($docCol->ErrorDetected) || ($docCol->IsVoid)) return -1;
                
        for ($i = 0; $i < $docCol->Count; $i++)
        {
            $doc = $docCol->Documents[$i];
        }
            
        $index = $docCol->IndexOf($doc);
            
        return 0;
    }
}
?>