Check these pages at BlitzCoder:
http://www.blitzcoder.com/cgi-bin/articles/show_article.pl?f=mutteringgoblin09232002232208.html
http://www.blitzcoder.com/cgi-bin/articles/show_article.pl?f=gamekrylar10192000.html
They give a complete explanation to what types actually ARE and how to use them.
http://www.blitzcoder.com/cgi-bin/articles/show_article.pl?f=mutteringgoblin09232002232208.html
http://www.blitzcoder.com/cgi-bin/articles/show_article.pl?f=gamekrylar10192000.html
They give a complete explanation to what types actually ARE and how to use them.