此源码是TreeView控件的CheckBox三态显示的源码，对于使用TreeView控件编程的朋友们来说，这个非常有用。三态即：选中复选框、未选中复选框和根节点下的子节点部分选中的状态。
This source code is a TreeView control tri-state CheckBox displays source code, the use TreeView control programming friends, this is very useful. Tri-state, namely: check the box to not check the box and the root part of the child nodes under the selected state. (2009-12-07, ASP, 62KB, 下载29次)