1) From your desktop, right-click and create a new text document.
2) Change the file extension from .txt to .udl
becomes:
3) Click Yes to verify the change of extension type.
4) Open the UDL file and set properties.
5) Test the connection.
6) Click OK.
7) Change file extension back to .txt
8) Take a look at your connection string.
It is a nice easy way to verify your SQL connections when you need to verify that you still have a SQL connection. The real reason that I wrote this post is that I was spending too much time trying to recall the UDL extension name.