I'm being passed a project in which I need to write some Excel 2010 x64 addins that basically pulls data from an MS SQL database. I can download the project in Visual Studio from SourceSafe and it Builds (Build > Build Solution) but I'm not sure where the addin file is outputted to? Pretty new to making addins but not new to C#.

Also, how would I know whether this would be outputting an XLA or XLL file?

And lastly I guess, how do I install this addin in Excel 2010? Do I just go File > Options > Addins > Go (at bottom) > and browse for this file?