The PageRange type exposes the following members.
Numbers of pages within range. If 0 - page range spreads until end of the document no matter how much pages it consists of
Exclusive end page number, until which this page range continues and on which is stops exclusively. If 0 - page range spreads until end of the document
Indicates whether this instance represents a default "fully open" page range i.e. it represents all pages of a document (true) or not (false)
Inclusive start page number, from which this page range starts. If 1 - page range starts from the first page of a document