Hi, if I want use the boost libs in an existing MFC/AFX environment I have a lot of compiling problems, what seems to depend on the order of includes. One problem what I see, but I don't understand, is the following compile error: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8804 for 80x86 Copyright (C) Microsoft Corp 1984-1998. All rights reserved. cl /MDd /W3 /GR /GX /Zi /Od /I ...bunch of includes... /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_SECDLL" /D "_AFXDLL" /D "_ MBCS" /D "_GXDLL" /D "NOMINMAX" /D "_SECNOMSG" /D "_GXNOMSG" /D "_SFLNOMSG" /Fp" D:\temp\debug\GUIClient/Plato.pch" /YX"stdafx.h" /Fo"D:\temp\debug\GUIClient/" / Fd"D:\temp\debug\GUIClient/" /FD /Zm200 /GZ /c "F:\Gui+Client\src\AboutDlg.cpp" AboutDlg.cpp Note: Using precompiled header Automatically linking with RWUXThemeSD.lib ..\..\PlatoServer\Basics\boost\inc\boost/detail/iterator.hpp(326) : error C2039: 'difference_type' : is not a member of 'Iterator' ..\..\..\libs\stingray\objective_studio\include\foundation\Patterns\Iter ator.h(77) : see declaration of 'Iterator' ..\..\PlatoServer\Basics\boost\inc\boost/detail/iterator.hpp(331) : see reference to class template instantiation 'boost::detail::standard_iterator_traits<Iterator>' being compiled ... So it looks like, that the template parameter "Iterator" in "boost::detail::standard_iterator_traits<Iterator>" conflicts with the template class "stingray::foundation::Iterator" in some header files from the GUI control stuff, what was included before the boost header. How is this possible, what has the template parameter "Iterator" in the namespace "boost::detail" to do with the template class "Iterator" in the namespace "stingray::foundation" has anybody an explaination for this? regards Arno