How to close an Instance of an inventor using inventor api?

[arunkgvm]

I cal an instance of an inventor using inventor api ,vb.net code. here is my code

inventorApp = CreateObject("Inventor.Application", "")

inventorApp.Visible = True

My doubt is and how can I close this inventor instance.I tried 

inventorApp.Visible = False

but not working. Anyone have any idea??

[saseendrankombath · Accepted solution]

inventorApp.Quit
set inventorApp = Nothing

 You can close the inventor instance by using the above code