LNK2019 error in SURF_FlannMatcher.cpp

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Done with OpenCV2.4.3 settings. SURF_FlannMatcher.cpp is giving LNK2019 error as follows :

Error 1 error LNK2019: unresolved external symbol "public: __thiscall cv::SURF::SURF(void)" (??0SURF@cv@@QAE@XZ) referenced in function _main C:\Users\Ankit\Documents\Visual Studio 2010\Projects\FLANN\FLANN\SURF_FlannMatcher.obj

There should not be any error as this code is in the tutorial book by OpenCV2.4.3 Somebody please help me out...