SldWorks or ISldWorks ?

Hi All

Is there any change in Solidworks Api in 2016 ? when I insert

Dim swApp as SldWorks.SldWorks

it seems that it's not working , cause when I want to set the parameter in the next lines in the body, like NewDoc, it doesn't autofill. I tried ISldWorks, but yet not sure if it's right, and no autofill as well

what would be the problem ?