Visual Studio 2008 to Visual Studio 2012

I am new to 2012. I see in the toolbox there is a tab for AJAX EXtensions. I remember in 2008 I had to import AJAX tool box. Is AJAX now included in 2012?

I brought an existing web form and code from a 2008 version as I want to try and start converting 2008 to 2012.  In the first page i brought over in 2008 I am using a ToolkitscriptManager, but it does not exist in 2012.   in 2012 they have a scriptmanager, ScriptmanagerProxy, a Timer, Update Panel and Update Progress.

So I am a little confused as to what I should be doing here.  Do I still need to import an AJAX toolbox in, or do I no longer use a toolkitscriptmanager ?

Thanks