Are you sure you are importing System.Threading in the module?
As an alternative, did you try:
Dim ts as System.Threading.Thread
I have exactly the same environment as you. I created a Windows project and in the form load event placed:
Dim ts as Thread
and got a "Type 'thread' is not defined." error, not the "Type Expected" error you got.
When I placed an "Imports System.Threading" at the top of the form, the error went away. It also went away when I wrote the line as "Dim ts as System.Threading.Thread". Either way works for me...
Jeff Mason
Custom Apps, Inc.
www.custom-apps.com