Context.AddError
<%@ Page Language="vb" %> <html> <head> <script runat="server"> Sub Page_Load() Try Context.AddError(New Exception("Test")) Finally Message.Text = "Context.Error.ToString() is " & _ Context.Error.ToString() Context.ClearError() End Try End Sub </script> </head> <body> <asp:label id="Message" runat="server"/> </body> </html>