VC++.NET如何扩展收缩对话框应用程序界面，鼠标点击一下按钮，会增加一个窗口界面，类似于窗口折叠展开的功能，很实用，应用广泛。-Contraction dialog box VC++.NET how to extend the application interface, the mouse click of a button, it will add a window interface similar to the window collapse an expanded, very pr