///
        /// Code extract from 'Recent Changes' web part 
        /// No warranties provided, proof of concept only
        /// Author: Scott Samuels
        /// Date:   12 April 2009
        /// 
	/// Gets the recent changes for the web in context occuring in the 
	///	given timespan.
	///

        private string[] getRecentChangesWeb(TimeSpan timespan)
        {
            ArrayList result = new ArrayList();
            
            SPSite siteCollection = SPContext.Current.Site;
            
            SPWeb site = SPContext.Current.Web;
               
            SPListCollection lists = site.Lists;

            SPRegionalSettings regionSettings = site.RegionalSettings;
            SPTimeZone timeZone = regionSettings.TimeZone;

            /// Get all the changes in the last timespan
            /// If the site collection has been created in the last 24 hours then 
            /// make sure you are only getting changes that have occured after it has been set-up
          
            SPChangeToken token = new SPChangeToken(SPChangeCollection.CollectionScope.Web, site.ID, DateTime.Now - timespan);
            SPChangeQuery query = new SPChangeQuery(true, true);
            query.ChangeTokenStart = token;

            SPChangeCollection changes = site.GetChanges(query);

            foreach (SPChange changedObject in changes)
            {
                switch (changedObject.GetType().ToString())
                {
                    case "Microsoft.SharePoint.SPChangeItem":

                        SPChangeItem changedItem = (SPChangeItem)changedObject;
                        try
                        {
                            if ((string.Compare(lists[changedItem.ListId].Title, "User Information List") == 0 && changedItem.ChangeType == SPChangeType.MemberAdd) ||
                               ((string.Compare(lists[changedItem.ListId].Title, "User Information List") != 0) &&
                                (string.Compare(lists[changedItem.ListId].Title, "Web Part Gallery") != 0) &&
                                (string.Compare(lists[changedItem.ListId].Title, "Master Page Gallery") != 0) &&
                                (string.Compare(lists[changedItem.ListId].Title, "Reporting Templates") != 0) &&
                                (string.Compare(lists[changedItem.ListId].Title, "Reporting Metadata") != 0) &&
                                (string.Compare(lists[changedItem.ListId].GetItemByUniqueId(changedItem.UniqueId).Name, "Get Started with Windows SharePoint Services!") != 0)))
                            {
                                string str;
                                SPUserCollection users = site.AllUsers;

                                switch (changedItem.ChangeType)
                                {
				    /// create a string that represents the adding of an item
                                    case SPChangeType.Add:
                                        str = lists[changedItem.ListId].GetItemByUniqueId(changedItem.UniqueId)["Created By"].ToString();
                                        /// get the user
                                        SPUser user1 = users.GetByID(Convert.ToInt32(str.Split(';')[0]));

                                        /// get their My Site public URL if it exists
                                        Uri mysiteUri = getUserPublicMySite(user1.LoginName, siteCollection);

                                        result.Add((string)"<a href=\"" + mysiteUri.AbsoluteUri + "\" alt=\"" + str.Split('#')[1] + "\">" + str.Split('#')[1] + "</a> created \"" + lists[changedItem.ListId].GetItemByUniqueId(changedItem.UniqueId).Name + "\" at " + timeZone.UTCToLocalTime(changedItem.Time));
                                        break;
										
				    /// do for more change types...
                      	            /// case SPChangeType.Update:
                                }
                            }
                        }
                        catch
                        {
                            Console.WriteLine("The object to which item " + changedItem.UniqueId + " belongs does not exist.<BR>");
                        }
                        break;

                }
            }
             
            return (string[])result.ToArray(typeof(string));
        }/// end getRecentChanges