This function returns the bookmark at the given index. The size of the bookmark list is returned by BookmarksCount. Index values start at zero, and continue up to one less than the value returned by BookmarksCount.
This example enumerates all the bookmarks:
cmark = BookmarksCount()
imark = 0
while (imark < cmark)
bookmark = BookmarksItem(imark)
// … do something with bookmark
imark = imark + 1