CVI is a C compiler, not C++. You can't add C++ code into CVI. We are compatible with Borland C++ object code, but it has to be C code or the functions have to be extern "C" to be callable from CVI. You could build the code into a DLL in Borland and provide C-style functions to instantiate and access the class in the DLL.
Best Regards,
Chris Matthews
National Instruments