I don't know if I can help you with that. A few things to consider 1) Why do you use boost::regex but regex_replace? I would try boost::regex_replace and see if that makes a difference. 2) The boost::regex_replace function is not in the boost/regex.hpp header, it's in another file (regex_replace.hpp) in a subdirectory which is included by regex.hpp. I would verify that you have a header with that function in it. 3) You could try downloading the Boost library and see if the code compiles. Regex requires a library but if does compile you know your current headers are broken in some way. 4) I would see what happens if you don't include windows.h. Every time I have included that and any STL/Boost headers I have had problems, so I no longer use windows.h in any real source file, only in simple glue logic ones. windows.h is an almost perfect storm of incompatibility and bad practice. At 09:44 AM 12/19/2008, P.C. wrote:

thank you for the response. unfortunately, we've tried to use the regex_replace function, but it gave an unexpected error: 'regex_replace' : undeclared identifier we used it in the following way: NOTE: the Regex++ we are using was downloaded from the original author's site, not entirely with the Boost library. we can't understand this error. if we downloaded and installed it according to the installation instructions for VC++, how can a function be missing?