Introduction - If you have any usage issues, please Google them yourself
#include "stdafx.h"
#include "cv.h"
#include "highgui.h"
extern "C" __declspec(dllexport) void Show()
{
IplImage *img = cvLoadImage("E:\\Image\\a.jpg");
cvNamedWindow("Image:", 1);
cvShowImage("Image:", img);
cvWaitKey();
cvDestroyWindow("Image:");
cvReleaseImage(&img);
return;
}