VC++显示超大图，在单文档里显示多个超大图，利用API图像处理技术，根据图像大小，增加滚动条-VC++ shows large map displayed in a single document in multiple large map, using API image processing technology, according to the image size, add scroll bars

一个通过调用百度地图API来显示全国地图的小demo，可以参考一下-API to display a map of the country by calling Baidu map small demo, you can refer to