new on asp.net 2.0 trying to figure out how to connect to a database

Right now I'm just looking at websites how to create a database and putting it in the App_Data folder which is no problem. What I want to do is Programmatically do it. in the example code that I see it says:

Dim ConnString as string = ConfigurationManager.ConnectionStrings(connStringName).ConnectionString

or

Dim MyConnString as new sqlconnection = New SqlConnection(ConfigurationManager.ConnectionStrings(connStringName).ConnectionString)

now every time I put the connStringName in the parenthasis it tells me that its an error: Name connstringName is not declared.

I figure the connstringName is the name in the connectionStrings in the web.config.

So I am doing something wrong here, I would appreciate any help.

Have a look athttp://www.asp.net/learn/videos/view.aspx?tabid=63&id=49

alsohttp://www.asp.net/learn/videos/view.aspx?tabid=63&id=110

and very concisely inhttp://quickstarts.asp.net/QuickStartv20/aspnet/doc/data/databases.aspx#connstrings

HTH