VC.NET如何使用树形控件，本例以读取磁盘分区和目录为例，向VC++.NET学习者展示树控菜单如何使用，在本程序中，点击树形的节点，会展开二级的目录树，当然还可以继续向下展开，不过方法已经演示给大家了，需要展开多少级就自己动手实现吧。-The how VC.NET use tree controls, in this case to read the disk partition and directory, for example, show how to use the tree control menu to VC++.NET learners, in this program, click on the tree node, expand two directory tree, of course, can continue to drill down, but the method has been demonstrated to everyone, you need to expand on their own hands to achieve it.