实现了VB，MO最短路径搜索。具体功能包括，2点间最短路径动态显示，各段长度标注。鼠标点击搜索最短路径，输入目标模糊查询搜索出最短路径。-Achieved VB, MO shortest path search. Specific functions include a 2-point shortest path between the dynamic display, the segment length annotation. Mouse click search the shortest