i would like to subclass libpq++ classes

hi!

sorry about my poor english

i would like to use the libpq++ interface under vc6
the source files already extracted and compiled
i have the libs and dll of libpq++

i compiled the example programs 
i have some problems compiling the examples (i think with namespaces)
but that is not important for me

i would like to subclass the libpq++ classes
i created a new project and a new class this way

include "libpq++.h"
class myconnect: public PgConnection
{
...
};

but the compiler don't find the PgConnection class

is there a manual of using the interface under win?
or somebody can help me?

thanks