As you discovered from my previous post, today I'm working on WPF, Again on codeproject, I found this series of articles that can be a good start point to understand basics on WPF, XAML, resources, styles...
WPF - A Beginners guide part 2 of n - XAML and Resources
WPF - A Beginners guide part 3 of n - Commands and Events
WPF- A Beginner's Guide - Part 4 of n - Dependency Properties
WPF- A Beginner's Guide - Part 5 of n - Data Binding
WPF - A Beginner's Guide - Part 6 of n - Templates