Problem with using Qt New Functions of OpenCV2 [closed]

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Hello, the problem I encounter is that when I try to add a button to the image window using "cv::createButton" function from the HighGui Module of OpenCV2, the build process always fails:

undefined reference to `cv::createButton(std::basic_string<char, std::char_traits<char="">, std::allocator<char> > const&, void ()(int, void), void*, int, bool)'

After I checked online, I know that this function is one of the Qt New Functions of the HighGui Module of OpenCV2. I also checked some information about using qt with ros, but it seems that they do not work for me. I thought OpenCV packages have already integrated these functions, so they could be used like other normal OpenCV functions without special cares (I mean, in ROS).

So how should I change my cmake file to make them work, or which libs do I need to use such functions?

I use ROS-Fuerte with Ubuntu 12.04, the version of OpenCV is

Version: 2.4.2-0precise-20120908-1632-+0000

Thanks for any help!!