How come you're trying to open your project by using your loopback address? It would be on the hard drive. When you click Run it would start a server on a specific port then run off of that port.

wilf57 wrote: MsgBox() function from asp.net 2.0 There is no such thing. MsgBox is a hangover from VB6, in VB.NET, in WinForms. It has nothing to do with ASP.NET. wilf57 wrote: It only works well on development systems, where server and browser are on the same system? Correct, because it runs on the server. You can't do stuff like that in C# or VB.NET and have them appear on the client. You need instead to use the alert function, which is a javascript API and thus can run on the client ( so you need to inject javascript into your page, so it appears on the client ) wilf57 wrote: but I thought MsgBox() does this functionality for us per hidden script No. Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Ok I solved that, the MsgBox() calls were the reason. When I pulled them out it works well on the targhet system

wilf57 wrote: I wrote a public property (Text) in the user control, so I can read and write the listbox(the one in the user control) on the server side but that doesn't help on the page client side, right?! The property is not for use on the client side, but on the server side. wilf57 wrote: So you say in the page client script I cannot access the listbox inside the user control by its ClientID property , only by the hard coded ID. You can never access a control from the client side, regardless of where it is. The control only exists on the server side, the only thing that is left of it on the client side is the html elements that it renders. The concept of a user control doesn't exist on the client side. You can access any element in the page, regardless of how the code for it is created on the server. What you have to do is simply get access to the right control so that you can get the ClientID for it, then you can use that in the client code to access the control without problem. --- single minded; short sighted; long gone;