Advanced color editing dialog?

[Richard]

[Please do not mail me a copy of your followup]

Has anyone else made an advanced color editing dialog?  Things like
being able to edit in a color space other than RGB and include alpha
in the selected color.  There are a variety of methods for editing
colors in other color models and I'd rather not reinvent the wheel
when making an advanced color editing dialog.

Thanks!
-- 
"The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download
      <http://www.xmission.com/~legalize/book/download/index.html>

        Legalize Adulthood! <http://blogs.xmission.com/legalize/>