对树形控件中项目的添加、图标的建立、项目的选择以及右键弹出快捷菜单等技术进行详细的阐述,对树形控件项目的操作与更新进行说明,对在树形控件与数据库的连接中需 要注意的问题进行了探讨。-On the tree control to add the item, the icon of the establishment of project selection and the right technologies such as pop-up shortcut menu detail, the o