I have a custom C# script that consists of 3 class definition .cs files.  The first one is the main script which implements the "Execute" method and is the entry point for the activity.  The secondary .cs class definitions are supplemental to this main class and are used by it to do the necessary tasks.  I need to track information that is happening inside one of the other supplemental classes.  But I can't seem to reference or import the necessary Laserfiche workflow DLLs that will make WorkflowApi.TrackInformation available.  Can anyone tell me what references and using statements I need in order to make this happen without moving my supplemental class into the main.cs?