You'll need to do the following:
You will need to configure STLport by changing (uncommenting) the following line in the file
STLport-4.5.3\stlport\stl_user_config.h
# define _STLP_NO_OWN_IOSTREAMS 1 // Use the compiler native IOSTREAM library.You do not have to compile STLport - with the above change, your will only be using the header files.
\APIs\STLport-4.5.3\stlport(Path will be different if you installed the libraries in different locations.)
Note that order is important! Specifically, the STLport directory must be your very first include path so that you will not have conflicts with the STL included in MSVC.