本项目里的源码，通过加入OLE等COM技术，对树控件功能进行了扩展，功能非常强大，树控件之间可以进行相互拖拽等-Source in this project, by joining the OLE and other COM technology, the tree control functionality extension is very powerful, mutual drag between the tree control

关于ext-js4.0树控件的增加，删除，修改的功能-Additions and deletions to about extjs4.0 tree control

用VB制作数据结构课程中的二叉树控件,在VB中学习数据结构及应用的好文章-VB produced in a binary tree data structure courses controls, a good article to learn data structures and application in VB