stack blendlevel with opaque controls?

[Richard Gaskin]

I think I know the answer to this (no), but has anyone unlocked a secret 
way to make good-looking transparent palettes in which the palette is 
black with a blendlevel of about 30 but the controls within it are fully 
opaque?

I know I could use a window shape with an alpha channel for this, but 
that's more work than I'd prefer to do for multiple platforms, and seems 
error-prone (not to mention losing the smooth built-in resizability).

--
  Richard Gaskin
  Fourth World
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