这是我继上一章VC windows编程后的第二章上传的内容，主要涉及了对话框编程、单文档界面和多文档界面编程 和 视图和窗口管理编程、高级用户界面编程等内容-This is my VC windows programming, following the previous chapter the second chapter after the upload is mainly involved in the dialog box programming, single-document int