The links in the following exert from the OpenOffice.org page:
http://api.openoffice.org/TipsAndTricks/external.html no longer seem to work.  

They each lead to a web page with the following message:
"Not Found
The requested object does not exist on this server. The link you followed is
either outdated, inaccurate, or the server has been instructed not to let you
have it. Please inform the site administrator of the referring page."

Here are the paragraphs from
http://api.openoffice.org/TipsAndTricks/external.html that have the invalid links:
# StarOffice 7 Software Basic Programmer's Guide
This document provides an introduction in StarBasic and the API and provides a
lot of useful hints for migrating from a well known (other) Basic language to
StarBasic/OpenOffice.org Basic.
This guide is available in the following languages:
English | German | French | Spanish | Italian | Swedish | Japanese | Simplified
Chinese | Traditional Chinese | Korean
# StarOffice 6.0 Software Basic Programmer's Guide This document provides an
introduction in StarBasic and the API and provides a lot of useful hints for
migrating from a well known (other) Basic language to StarBasic/OpenOffice.org
Basic.
# Sun published StarOffice documentation
On this side you can find different documents around StarOffice published by Sun.