Any way to get the area of a mask to use in an expression?

I'd like to find the area of a mask, or even just the bounding width or height to use as a variable in an expression.
For example I'd like to have the brightness of a solid based on the area( or a dimension)  of a mask that resides in it.
I can't see that you can access these things, but I know that some scripts can, for example, access and change the individual nodes of a mask.
So there must be more to it than I have found, anyone know where to find info on modifying masks with expressions? perhaps that will lead me in the right direction.

Yes!  It`s very interesting for me too. I know what by expression i can`t change the mask form in current version AE, but may be in feature?
Jockomofeenahnay you can do the search in google with:
After Effects Mask script words. It`s all what we have at this time

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