树状控件响应鼠标双击消息，并将相应的消息显示在其父窗口：单文档中,treeview ctrl respond the message of mouse,and show the message to the single document.

支持树形控件的背景变换。图片为bmp格式。同时树形节点能够响应鼠标单击，并能更改图标。-Support the tree controls the background transformation. Pictures as bmp format. While the tree nodes can respond to mouse clicks, and can change the icon.