根据一副地图，在地图上任意点击两地点，可画出两点的最短距离路线。对要熟悉MFC用法及最短路算法的初学者有很大帮助。-According to a map, click on the map on the two locations, you can draw two points of the shortest distance route. To be familiar with MFC usage and the shortest path algorithm for beginners a