http://msmvps.com/blogs/luisabreu/archive/2007/11/12/changing-the-contents-of-the-updateprogress-control.aspxToday I've answered a question on the ASP.NET AJAX forums that asked something like this: how do I get a reference to the controls defined inside an UpdatePanel or UpdateProgress controls? The first part is easy: just use the ID of the control. TheenCommunityServer 2008.5 SP2 (Build: 40407.4157)