or

Dim newwindow As New Telerik.Web.UI.RadWindow()
newwindow.ID =
"RadWindow1"
newwindow.NavigateUrl =
"CustomerContact.aspx"
newwindow.VisibleOnPageLoad =
True
newwindow.Height = 482
newwindow.Width = 504
newwindow.Modal =
True
newwindow.VisibleStatusbar =
False
newwindow.ShowContentDuringLoad =
True
RadWindowManager1.Windows.Add(newwindow)