Why stop building with error "Thread support is unavailable!"

From: xuejm (xuejm_at_[hidden])
Date: 2002-08-05 23:35:39

Hi,

I installed boost1.28.0 with microsoft visual c++ .NET and regex worked very well, but when I build a very simple example to test boost.thread, it stop building with error "Thread support is unavailable!".

I found out that it's because that there's not a pre-define variable defined.

Can I define the variable? How can  I use boost.thread in my vc++ .net?

TIA

Phipps Xue