VC++局部放大图像演示实例，WEB上有不少类似的应用，一般都使用插件实现，用VC实现倒是还没有见过，不过应该也不复杂，其实也就是一个放大镜效果，鼠标移动到图片上，会把接近的区域按比例放大，本例子中添加了两个快捷功能，点鼠标左键是缩小图像，右键是放大图像。

-VC++ to enlarge the image shows examples of local, WEB there are many similar applications, using plug-ins are generally achieved, VC achieve' d have never met, but should not be too complicated, in fact, is a magnifying glass effect, move the mouse to the picture, the area will close in proportion to enlarge, in this case adds two shortcuts, point the left mouse button is to narrow the image, right is the enlarged image.