Hi Gordon!

As a response to your questions

1. Class Library
2. You can actually do both and also with a separate code behind-file. I usually develop without compiling into DLL, because it is faster than having to press build each time. Then, when I need to distribute the file to a client I compile it into a DLL for easy distribution. If you choose not to compile every time, the .aspx.cs file must reside in the same location as the aspx-file
3. You do that by referencing the umbraco.dll file. Once done, you'll see Library pop up in the Intellisense box

Hope this helps

Simon

Hi Gordon

Oh, yes - my mistake - you can ofcourse use Web Application project if you want a project template to work with :-)

In order to retrieve web.config-settings you can use:
System.Configuration.ConfigurationSettings.AppSettings["umbracoSmtpServer"]

Hope this helps
Simon