(Structure window Structure window can be divided into two categories: one is to use the program main window, and the other is the document window. 6.1.1 The main structure window of the main window and document window is the window that the user program directly places on the desktop (DeskTop). Each user program can only have one main structure window. The title of the user program is usually displayed on the title bar of the main structure window.
Chapter 6 Structure Window, Document and View.ppt)