Hi Boost- Devs I noticed a problem with the use of asio together with the test program exec monitor. If you include the prg_exec_monitor.hpp before the asio.hpp the boost.test lib includes winsock.h. In the next step asio includes the winsock2.h. The result is that there are many redefinition errors like these: d:\librarys\boost\include\boost-1_33\boost\asio\detail\socket_types.hpp(41) : warning C4005: 'FD_SETSIZE' : macro redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(51) : see previous definition of 'FD_SETSIZE' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(112) : error C2011: 'fd_set' : 'struct' type redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(54) : see declaration of 'fd_set' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(147) : warning C4005: 'FD_SET' : macro redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(88) : see previous definition of 'FD_SET' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(156) : error C2011: 'timeval' : 'struct' type redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(97) : see declaration of 'timeval' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(212) : error C2011: 'hostent' : 'struct' type redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(153) : see declaration of 'hostent' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(225) : error C2011: 'netent' : 'struct' type redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(166) : see declaration of 'netent' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(232) : error C2011: 'servent' : 'struct' type redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(173) : see declaration of 'servent' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(244) : error C2011: 'protoent' : 'struct' type redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(185) : see declaration of 'protoent' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(400) : error C2011: 'sockaddr_in' : 'struct' type redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(321) : see declaration of 'sockaddr_in' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(410) : error C2011: 'WSAData' : 'struct' type redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(331) : see declaration of 'WSAData' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(470) : warning C4005: 'SO_DONTLINGER' : macro redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(411) : see previous definition of 'SO_DONTLINGER' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(527) : warning C4005: 'AF_IPX' : macro redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(469) : see previous definition of 'AF_IPX' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(555) : warning C4005: 'AF_MAX' : macro redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(488) : see previous definition of 'AF_MAX' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(561) : error C2011: 'sockaddr' : 'struct' type redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(494) : see declaration of 'sockaddr' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(601) : error C2011: 'sockproto' : 'struct' type redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(503) : see declaration of 'sockproto' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(640) : error C2011: 'linger' : 'struct' type redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(540) : see declaration of 'linger' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(653) : warning C4005: 'SOMAXCONN' : macro redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(553) : see previous definition of 'SOMAXCONN' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(679) : warning C4005: 'FD_READ' : macro redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(571) : see previous definition of 'FD_READ' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(682) : warning C4005: 'FD_WRITE' : macro redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(572) : see previous definition of 'FD_WRITE' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(685) : warning C4005: 'FD_OOB' : macro redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(573) : see previous definition of 'FD_OOB' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(688) : warning C4005: 'FD_ACCEPT' : macro redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(574) : see previous definition of 'FD_ACCEPT' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(691) : warning C4005: 'FD_CONNECT' : macro redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(575) : see previous definition of 'FD_CONNECT' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(694) : warning C4005: 'FD_CLOSE' : macro redefinition d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(576) : see previous definition of 'FD_CLOSE' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(1626) : error C2375: 'accept' : redefinition; different linkage d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(744) : see declaration of 'accept' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(1647) : error C2375: 'bind' : redefinition; different linkage d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(749) : see declaration of 'bind' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(1666) : error C2375: 'closesocket' : redefinition; different linkage d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(754) : see declaration of 'closesocket' d:\microsoft visual studio 8\vc\platformsdk\include\winsock2.h(1685) : error C2375: 'connect' : redefinition; different linkage d:\microsoft visual studio 8\vc\platformsdk\include\winsock.h(756) : see declaration of 'connect' ... Perhaps someone can add a notice about this situation to the docs. Andreas