Nested or Inner Classes

[GMS]

How do you represent a nested, or inner class in Visio? For instance:
Public Class SomePublicClass
Private ICVar as new InnerClass
Private Class InnerClass
'Implementation
End Class
End Class

It looks like the UML for this is a line with a circle at the end, and a
plus (+) sign in the circle. However, I can't find this anywhere in Visio,
and I'm not sure how to model this.

Thanks in advance, and I apologize if I'm not clear enough. I'll gladly add
more detail if necessary...