You must identify the window through which you will view the object.
The window is a virtual storage area in your address space. You are
responsible for obtaining the storage, which must meet the following
requirements:
- The storage must not be page fixed.
- Pages in the window must not be page loaded (must not be loaded
by the PGLOAD macro).
- The storage must start on a 4096 byte boundary and must be a multiple
of 4096 bytes in length.
To identify the window, use the window_name parameter.
The value supplied for window_name must be the symbolic
name you assigned to the window storage area in your program.
Defining a window in this way provides one window through which
you can view the object. To define multiple windows that provide simultaneous
views of different parts of the object, see Defining multiple views of an object.