How to Invoke a Particular Version of SolidWorks ?

Hi,

  I am a Newbie to SolidWorks Customization. 

I am using C# as coding language for writing the add-in’s. My doubt is that, I am using

SldWorks SwApp = new SldWorks();

to invoke SolidWorks, But what if I had installations of two different versions in my system and I need to invoke a particular Version ?

Thanks in Advance,

Regards

Venkata Ramesh V

SolidworksApi macros