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What libraries are you linking in? How have you set up this application to build? It looks as though the highgui library isn't being linked in, which would be necessary to make things work. How to do this depends on how you are building the application - either through Visual Studio (in which case you need to use the GUI to specify the OpenCV highgui library as something to link in) or through the command line (in which case you need to locate the library and modify the command line appropriately.)
