trying to identify associated workflow code?

Hello - This window says "processes designed outside the MS Dynamics CRM web app cannot be viewed or edited in the web app":

https://skydrive.live.com/redir?resid=2EB252D15406C571!121&authkey=!APipg1vZveI9wVc&v=3

However, the standard code solution does not appear to have any classes that appear to be associated with this particular workflow.

For example, the standard .NET solution for this project has a plugins class lib but not a Workflows class lib. So, what steps can I take to identify the underlying code/dll/class lib associated with this workflow?