I am authoring a C++ project with Visual Studio 2013 Professional and I encountered a problem I have never encountered before.
In one of my source files I am including a third-party header file like this:
#include 'sqlcli1.h'
This file (and other files of the same set) are located in a an external directory (not in the VS solution), so I have added it to the search path using Additional include paths under project's Properties.
The solution does build succesfuuly, so I am sure my external header file is referenced correctly. IntelliSense, however, still doesn't see it and complains about not being able to open source file 'sqlcli1.h'. It does not prevent me from building the project, but it makes editing it much harder.
Why does this happen and what should I do?