Implementing a multidock window system (like blend, visual studio) in WPF

Question

How would you go about to implement a docking toolbox windowing system as seen in Expression Blend where you can dock toolbox windows in a lot of ways beneat each other, ove

Answer 1

WPF already has controls which support docking (or that effect). Check Adam Nathan's WPF book WPF Unleashed, he covers it in part 2.