Is there a tutorial in UDK on shader script?

[advancecoder]

I was watching the UDK videos on materials and I found this quick reference to shader script. Is there any tutorial on the UDK website that explains what shader script is so I can do things programmatically rather than using the graphical programming setup of the materials editor in UDK.

Thanks!

[Wyldhunt]

It uses HLSL.