面向对象的，VB数据库三层结构经典示例，有treeview的事例-Object-oriented, VB classic example of three-tier structure database, there are examples of the treeview

TTreeView例子，Delphi数据库与TreeView相结合的实例，与普通的树控菜单比，这一款加入了数据库功能-Examples of the mix of TTreeView example, Delphi database with TreeView, than ordinary tree control menu, which added a database functions