用VC界面模拟二叉树算法，添加，删除，修改节点-VC interface with binary tree algorithm simulation, add, delete, modify nodes

该文档制作了两种形式的树目录小程序，一种是模拟资源管理器的，一种是模拟浏览框的，内容都比较简单，但适合初学者学习-The document produced two forms of the directory tree applet, one is analog Explorer, a browser is a simulation box, the contents are relatively simple, but for beginners to learn