The version string for Xerces-C++ is in one of the header files. Look
inside the file
src/xercesc/util/XercesVersion.hpp or, in the binary distribution,
If you don't have the header files, you have to find the version
information from the shared library name. On Windows right click on
the DLL name in the bin directory and look up
properties. The version information can be found in the Version tab.
On UNIX/Linux/Mac OS X platforms the version is
embedded into the library name.