[TYPO3-templavoila] Use of a selector box variable in BELayout

[Sebastian Schön]

Hi,
I´ve defined  an FCE with a selector box field_grid with some values for a css class definition.
In the field_content I use this:

10 = RECORDS
10 {
	stdWrap.dataWrap = <div  class="{field:field_grid}" >|</div>
	source.current=1
	tables = tt_content
}

So far so good. 

In the next step I want to use the selector box variable also in the BELayout
of this FCE. 

Also in the field_content:
5 = LOAD_REGISTER
5 {
	reg_beclass = field:field_grid
}

But I can´t receive any values in the BELayout context.
Is this in general possible? Have you any hints or ideas?

Thanks!

Sebastian