Hackers,
Luis has just pointed out to me that the wxWidgets book is now
available for (what appears to be free) download from the publishers
site:
http://www.informit.com/content/images/0131473816/downloads/0131473816_book.pdf
It's a few releases old now, but still a very useful reference (I have
the hardcopy version).
--
Dave Page
EnterpriseDB UK: http://www.enterprisedb.com