I was able to extract regex and build it, Thanks for the help for my previous problem. But, (there is always a but) the size is huge (well, more than one expects). I used "bcp boost/regex.hpp C:\Development\3rdParty\Regex" to extract the regex library. For now, I do not need to build the examples etc. The extracted directory contains 1246 Files (8.75 MB), and it looks like it contains bind, function, iterator, mpl, preprocessor, regex, thread, type_traits, utility, smart_ptr libraries from boost. (boost/mpl contains 649 files, boost/preprocessor contains 149 files) Although I used make files to build (VC80), when building regex, it didn't require the thread library. I wonder whether it is really necessary. Is there anything I can do to reduce the size of this? Or am I doing something wrong? For example when extracting smart_ptr library I commented out the line that includes in sp_counted_impl.hpp (I will not use it), so that bcp does not extract the mpl library, which reduced the extracted file count to 85, from 345. I wonder whether similar tricks are available for regex as well. -- Orhun Birsoy