Hey Dann,

I wasn't the original poster here ... but I'm pretty sure the book is "MEL Scripting for Maya Animators" by Mark R. Wilkins & Chris Kazmier ... Morgan Kaufmann publisher

mumbojumbo_13 was referring to example in CH 18

I believe one of the authors posted a resonse to my UI question and I forgot to thank him (Thanks !)

... the book is really good and I only know of 1 other that covers Mel in any depth. That is Complete Maya Programming by David Gould also Morgan Kaufman ... includes both Mel and Maya API.

Cheers