opencv - LNK2019: unresolved external symbol error in Visual Studio C++

Question

This is my code in Visual Studio C++

#include "stdafx.h"
#include<opencvcv.h>
#include<opencvhighgui.h>

using namespace cv;

int main(int argc, char** argv[]) {
  IplImage* img = cvLoadImage("logo.jpg");
  cvNamedWindow("Test", CV_WINDOW_AUTOSIZE);
  cvShowImage("Test", img);
  cvWaitKey(0);
  cvReleaseImage(&img);
  cvDestroyWindow("Test");
  return 0;
}

I am using OpenCV 2.4.6 and Visual Studio 2010. This is the error:

openCV_testing.obj : error LNK2019: unresolved external symbol _cvDestroyWindow
referenced in function _main
openCV_testing.obj : error LNK2019: unresolved external symbol _cvReleaseImage     
referenced in function _main
openCV_testing.obj : error LNK2019: unresolved external symbol _cvWaitKey referenced in  
function _main
openCV_testing.obj : error LNK2019: unresolved external symbol _cvShowImage referenced   
in function _main
openCV_testing.obj : error LNK2019: unresolved external symbol _cvNamedWindow    
referenced in function _main
openCV_testing.obj : error LNK2019: unresolved external symbol _cvLoadImage referenced 
in function _main

Please help.

Answer 1

'unresolved external symbol' means that you're not linking with required library. Go to Properties -> Linker -> Additional Library dependencies and add path to OpenCV libs.