Hi, using Code Blocks i got the following message: ld.exe "Cannot find -lboost_filesystem-mgw-mt-s-l_33_l" Then I do: cd C:\Documents and Settings\Administrateur\Bureau\boost_1_34_0\boost_1_34_0\tools\jam\src then C:\Documents and Settings\Administrateur\Bureau\boost_1_34_0\boost_1_34_0\tools\jam\src\build.bat Then I set the following variables: BOOST_ROOT= C:\Documents and Settings\src\boost and BOOST_BUILD_PATH=C:\Documents and Settings\src\boost\tools\build\v2. I don't know what to do now. It's a question like the other questions, so thank you for your response. _________________________________________________________________ David Guetta a réuni les sons les plus connus de Messenger dans le Mix Messenger, le son de l’été ! Téléchargez-le gratuitement ! http://specials.divertissements.fr.msn.com/mixmessenger