vc编程，用opencv求一幅bmp图像中的圆心-a bmp image in the center of the circle with opencv and vc programming

用vc对文件夹的BMP图片文件进行读取，并显示，另外，通过“上一个”“下一个”按钮，查看所有的文件图像-BMP picture files folder using vc read, and show, by a " a" button, all files image