这是一个节点拖动的小程序，对于一些节点如何设置，如何拖动，如何自动调整等c++编写有参考作用。-This is a node drag applets, how to set up some of the nodes, how to drag, how automatic adjustment c++ Prepared by a useful reference.

实现可以拖动的tree控件，自由选择位置，有需要的可以下载看下-Implementation can drag the tree control, free to choose the location, there is a need to download the next look