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.

对于窗体的分割，树控件的应有（带图标），列表视类的应有对鼠标双击的响应等-The form of the split, the tree control should be (with icon), depending on the class list should be the response of the mouse double-click, etc.