You can read about the special folders in an ASP.NET 2.0 application in MSDN: ASP.NET Web Site Layout [^] You can place your web user control in the application as you would with the web page. To access the class of the user control from the web page, you can use the Reference directive. For more information, you can see: ASP.NET User Controls Overview [^] @ Reference [^]

It would be easy to design a socket application to solve that. But i think what he need is a solution on web absolutely, there's no thing installed on the client. And i wonder that there's any solution for this? How can we capture images from the client side if we know its IP Address? And the way that we display it on web?

By design, the DataList control does not support the paging functionality, if you want that, you need to provide your sample code to implement the custom paging. There are a couple of options which you can use, and you can see the sample code from here[^]. If you want to use the built-in paging functionality, you may consider using another control like DataGrid, or GridView(in the ASP.NET 2).