title: Possible to view source code or decompile XLL Excel add in
body: <p>Is it possible to view the source code of the XLL Excel add in without having the original source code? I'm guessing that this XLL was written in C#, but not sure. I.e. a .NET DLL you can decompile with dotPeek, or an XLA file you can open in Excel via Developer > Visual Basic. I tried both approaches with no luck.</p>