vs2005环境，继承treeView控件，实现项目多选，对控件项目鼠标拖曳，提取项目数据；外加skinHu皮肤库，百度影音皮肤-vs2005 environment, inheritance treeView controls to achieve multiple choice, drag the mouse on the control project to extract project data plus skinHu skin library, Baidu video skin