Qt, qmake, Visual Studio 2008 and third party library

it is my first question here; I think I did my homework pretty well, however I am still stuck with that problem:

I try to add in the include search path of my project property page in Visual Studio the include loc开发者_如何转开发ation I'd like to use. I already added OpenCV with NO PROBLEM at all, so I used the same syntax, but it is like VS2008 can't see the .h into the include folder: I get this at compilation:

Cannot open include file: 'FlyCapture.h': No such file or directory.

So, I tried to add the full path in my code, it then seems to find FlyCapture2.h, however, I get the error 'Image' unkown identifer at compilation...

Any help with this would be very, very appreciated!