At 09:41 AM 1/19/02 +0000, you wrote:

I got this message:

c:\boost_1_26_0\boost\thread\thread.hpp(17) : fatal error C1189: #error : Thread support is unavailable!

I use VC++ on Win98 so now what??????????

You need to make sure that your project is set to use the multithreaded libraries. Visual C++ does not compile for multithreading by default. Go to Project Settings - C/C++ - Code Generation and pick one of the multithreaded DLL options from the "Use run-time library" pulldown. Steve