// CLoadPictureApp 消息处理程序
using namespace cv;

int main(int argc, char* argv[])
{
    Mat img = imread("lena.jpg");

    if(!img.data)
        return -1;

    NameWindow("lovelena", CV_WINDOW_AUTOSIZE);
    imshow("lovelena", img);
    waitKey();

    return 0;
}

question:error C3861: “NameWindow”: 找不到标识符