自动弹出选择框并自动选择的复选框,The combobox which can popup selector dialog and select automatically

Visual C++实验成果 输入、编译、运行课本第五章中第183页到第186页的Ex_Tree的程序，掌握CTreeView文档视图的使用方法，掌握列举磁盘目录的方法以及在树视图中显示的方法。(Visual C++ experimental results Input, compile and run Ex_Tree program from page 183rd to page 186th in the fifth chapter of the textbook. Grasp the u