Can anybody help?

I am writing a Vb.Net AddIn for Solidworks.

I want to be able to open a part document using a sub routine in a module called "Module1.vb"

How can I make swApp global, in my class module, so it can be used in a sub routine contained in a separate module?

Here is my code that I am using....

Module Module01
   Sub OpenPartDocument()
       doc = swApp.OpenDoc6(FilePath, swDocumentTypes_e.swDocPART, swOpenDocOptions_e.swOpenDocOptions_Silent, "", Errors, ewarnings)
   End Sub
End Module
 

Many thanks in advance!

Darren