Boost tests in Visual Studio - c++

Question

I am trying to compile trivial unit test project in Visual Studio 2010. I have a testrunner.cpp:
#define BOOST_TEST_DYN_LINK
#define BOOST_TEST_MODULE "BaumWelch Unit Tests"
#include <boost/test/unit_test.hpp>
and exampletests.cpp
#include <boost/test/unit_test.hpp>
int add( int i, int j ) { return i+j; }
BOOST_AUTO_TEST_CASE( my_test )
{
// seven ways to detect and report the same error:
BOOST_CHECK( add( 2,2 ) == 4 ); // #1 continues on error
BOOST_REQUIRE( add( 2,2 ) == 4 ); // #2 throws on error
if( add( 2,2 ) != 4 )
BOOST_ERROR( "Ouch..." ); // #3 continues on error
if( add( 2,2 ) != 4 )
BOOST_FAIL( "Ouch..." ); // #4 throws on error
if( add( 2,2 ) != 4 ) throw "Ouch..."; // #5 throws on error
BOOST_CHECK_MESSAGE( add( 2,2 ) == 4, // #6 continues on error
"add(..) result: " << add( 2,2 ) );
BOOST_CHECK_EQUAL( add( 2,2 ), 4 ); // #7 continues on error
}
This example worked fine in Linux, however here it fails to compile:
1>------ Build started: Project: Test, Configuration: Release Win32 ------
1>Build started 30/01/2013 14:47:48.
1>InitializeBuildStatus:
1> Touching "Release\Test.unsuccessfulbuild".
1>ClCompile:
1> All outputs are up-to-date.
1>boost_unit_test_framework-vc100-mt-1_46_1.lib(boost_unit_test_framework-vc100-mt-1_46_1.dll) : error LNK2005: "class boost::unit_test::master_test_suite_t & __cdecl boost::unit_test::framework::master_test_suite(void)" (?master_test_suite#framework#unit_test#boost##YAAAVmaster_test_suite_t#23#XZ) already defined in libboost_unit_test_framework-vc100-mt-1_46_1.lib(framework.obj)
1>MSVCRT.lib(crtexew.obj) : error LNK2001: unresolved external symbol _WinMain#16
1>C:\Users\ga1009\Documents\dev\Oasis\Release\Test.exe : fatal error LNK1120: 1 unresolved externals
1>
1>Build FAILED.
What am I doing wrong and how can I fix it?
EDIT: After applying the answer from Arne Mertz, I get:
1>------ Build started: Project: Test, Configuration: Release Win32 ------
1>Build started 30/01/2013 15:09:54.
1>InitializeBuildStatus:
1> Touching "Release\Test.unsuccessfulbuild".
1>ClCompile:
1> All outputs are up-to-date.
1>boost_unit_test_framework-vc100-mt-1_46_1.lib(boost_unit_test_framework-vc100-mt-1_46_1.dll) : error LNK2005: "class boost::unit_test::master_test_suite_t & __cdecl boost::unit_test::framework::master_test_suite(void)" (?master_test_suite#framework#unit_test#boost##YAAAVmaster_test_suite_t#23#XZ) already defined in libboost_unit_test_framework-vc100-mt-1_46_1.lib(framework.obj)
1>C:\Users\ga1009\Documents\dev\Oasis\Release\Test.exe : fatal error LNK1169: one or more multiply defined symbols found
1>
1>Build FAILED.

Answer 1

Check your project's linker properties: There is a property System/SubSystem that should be set to /SUBSYSTEM:CONSOLE.
Edit:
For the multiple definition error it seems you have the following situation:
In your testrunner.cpp, you define BOOST_TEST_DYN_LINK wich leads to a dynamic linking of boost_unit_test_framework-vc100-mt-1_46_1.dll which contains a definition of the master_test_suite function. In the other .cpp, you do NOT define that symbol, so that one gets linked statically against boost_unit_test_framework-vc100-mt-1_46_1.lib which, together with the dll gives two definitions.
Solution: use the #define in every source before including the header.