I've created a custom server control in ASP.NET to render a standard checkbox and a hidden field like this:\[code\]public class CheckAllBox : WebControl{ private string checkboxClientID; protected override void OnInit(EventArgs e) { checkboxClientID = String.Format("{0}{1}chbCheckAll", base.ClientID, base.ClientIDSeparator); base.OnInit(e); } protected override void Render(HtmlTextWriter writer) { //Render checkbox writer.AddAttribute(HtmlTextWriterAttribute.Id, checkboxClientID); writer.AddAttribute(HtmlTextWriterAttribute.Name, checkboxClientID); writer.AddAttribute(HtmlTextWriterAttribute.Type, "checkbox"); writer.AddAttribute(HtmlTextWriterAttribute.Value, Values); writer.RenderBeginTag(HtmlTextWriterTag.Input); writer.RenderEndTag(); //Render hidden field writer.AddAttribute(HtmlTextWriterAttribute.Id, String.Format("{0}{1}hdnExcludeValues", base.ClientID, base.ClientIDSeparator)); writer.AddAttribute(HtmlTextWriterAttribute.Name, String.Format("{0}{1}hdnExcludeValues", base.ClientID, base.ClientIDSeparator)); writer.AddAttribute(HtmlTextWriterAttribute.Type, "hidden"); writer.AddAttribute(HtmlTextWriterAttribute.Value, ExcludeValues.ToString()); writer.RenderBeginTag(HtmlTextWriterTag.Input); writer.RenderEndTag(); }}\[/code\]Now I want to retrieve the value of the hidden field and the checkbox when it is posted back - is it possible with the standard html I have rendered?I've already written jQuery that works with this markup but it does require a standard html checkbox with a value - not the kind of checkbox rendered by ASP.NET.If it is not possible to retrieve the value from standard html inputs, do I need to rewrite this as a composite control, or is there another trick?