problems adding header files

Hi, 

For my project I downloaded the Measurement software and installed the NI-488.2 drivers.

Now, at the end of my stdafx.h file I am trying to include the libraries from here:

#include "NiGraph3DComponent.h"
#include "Ni4882Component.h"
#include "NiCommonComponent.h"
#include "NiDAQmxComponent.h"
#include "NiDataSocketComponent.h"
#include "NiMathComponent.h"
#include "NiUiComponent.h"
#include "NiUiCommonComponent.h"
#include "NiUtilityComponent.h"
#include "NiVisaComponent.h"
using namespace NI;

However, when I try to compile it, it says all these header files cannot be found. How do I install these files or where do I find them so that I can include the libraries?