API Development without Solidworks

I've been tasked with enabling some conversion of Very Old Excel Scripts that we were using for importing Datapoints into Solid Works (Verison 12.0)

1) I Don't use Solidworks as our license doesn't cover that, I'm only doing the software development

2) We're Developing on Visual Studio 2010

3) Looking at the API, it appears to use the following DLLs thare are Installed with SolidWorks, but not with the API.

     solidworkstools.dll

     SolidWorks.Interop.sldworks.dll

     SolidWorks.Interop.swcommands.dll

     SolidWorks.Interop.swconst.dll

     SolidWorks.Interop.swpublished.dll

So My question is

1) How does one develop Applications for Importing Data into Solidworks without having a copy of Solidworks installed on the Development system?

2) How are developers to access the API without a Solidworks Install?

SolidworksApi macros