Boost in Visual C++ 6.0

From: imi123_1999 (imi123_1999_at_[hidden])
Date: 2002-05-16 11:54:50

I am a newbie so please help me a little. I am using Visual C++ 6.0 
in order to compile a program given as an example of threads. I am 
also copying the program below. But the problem is that the program 
is giving errors of unresolved externals. Please tell me how to 
change the settings of VC++ options. Here is the program:

#include <boost/thread/thread.hpp>
#include <iostream>

int count = 0;
boost::mutex mutex;

void increment_count()
{
   boost::mutex::lock lock(mutex);
   std::cout << "count = " << ++count << std::endl;
}

int main(int argc, char* argv[])
{
   boost::thread_group threads;
   for (int i = 0; i < 10; ++i)
      threads.create_thread(&increment_count);
   threads.join_all();
}

The errors i am getting are:

C:\Windows\Desktop\threadImI\imi.cpp(9) : error C2039: 'lock' : is 
not a member of 'mutex'
        c:\program files\microsoft visual studio\vc98
\include\boost\thread\mutex.hpp(35) : see declaration of 'mutex'
C:\Windows\Desktop\threadImI\imi.cpp(9) : error C2065: 'lock' : 
undeclared identifier
C:\Windows\Desktop\threadImI\imi.cpp(9) : error C2146: syntax error : 
missing ';' before identifier 'lock'
C:\Windows\Desktop\threadImI\imi.cpp(19) : warning C4508: 'main' : 
function should return a value; 'void' return type assumed
Error executing cl.exe.
Creating browse info file...

threadImI.exe - 3 error(s), 3 warning(s)