VC++图片的伸缩显示，并不是图像拉伸，类似于图片放大功能，在窗口中单击【1:1】按钮，图片不缩放；单击【按宽度】按钮，图片充满图片框的宽度；单击【按高度】按钮，图片充满图片框的高度；单击【充满】按钮，图片充满整个图片框；单击【居中显示】按钮，图片正好出现于图片框的中心，宽度和高度分别为图片框宽度和高度的一半。-VC++ Telescopic images displayed image is not stretched, similar to the picture zoom function, in the window, click the button [1:1], the picture does not zoom　click the [] button according to the width, the width of the picture box full of pictures　single Click [height] button pressing, picture fr a me full picture height　click [full] button, the picture fills the entire picture fr a me　click [centered] button, the picture just appeared in the center of the picture fr a me, width and height, respectively Pictures half of the fr a me width and height.