This chapter provides a general description of windows: how to open
windows and define their characteristics; how to get the system gadgets
for shaping, moving, closing, and depth arranging windows; how to handle
window I/O; and how to preserve the display when windows get overlapped.

 about windows                            the window structure 
 basic window structures and functions    window attributes 
 communicating with intuition             other window functions 
 window types                             function reference 
 preserving the window display