VC JPG图片操作源码 包括图片的放大，缩小，拖动等， 很多不足之处还望见谅。,VC JPG picture, including picture of the source operation to enlarge, reduce drag and so on, a lot of inadequacies in hope that will be forgiven.

滚动显示位图,通过拖动滚动条,显示较大图象。vc++源代码-Scrolling bitmap by dragging the scroll bar to show a larger image. Source code