HP SunSoft Pascal 4.0 - Manual (Page 250)

226 Pascal 4.0 User’s Guide
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Example calls are:
The lists for Attr_avlist are created by functions that have the following
names:
attr_create_list_ n ()
attr_create_list_ ns ()
• The n indicates the number of arguments the routine accepts.
•
The number of arguments can be 1-16.
• The routines ending in s return a pointer to a static attribute-value array,
which is reused with each call to the static list routines.
• The versions without the s return a dynamically allocated list, which should
be passed to xv_destroy() when you are finished with it.
Handles
When you create an XView object, xv_create() returns a handle for that
object. You pass this handle to the appropriate procedure for manipulating the
object.
Data Types
Each XView object has its own specific data type. The name of an object’s data
type always starts with a capital letter. For example, the data type for a
scrollbar is
Scrollbar . The standard list of these types is in the header files.
Here, mymenu is an object of
type XV_object.
mymenu := xv_create (NULL, MENU, 0);
ncols := get_MENU_NCOLS (mymenu);
set_MENU_NITEMS (mymenu, items);
xv_find_l (mymenu, MENU,
attr_create_list_2s (MENU_DEFAULT,4));
xv_destroy (mymenu);