st: How can I obtain the name of a variable's value label programatically?

["K Jensen" <k.x.jensen@googlemail.com>]

Hi
I would like to obtain the name of a variable's value label
programatically within  a loop.
For example:
. sysuse auto
(1978 Automobile Data)

. d foreign

              storage  display     value
variable name   type   format      label      variable label
-------------------------------------------------------------------------------
foreign         byte   %8.0g       origin     Car type

How can I create a local macro containing the variable's value label,
i.e. "origin"?

Thankyou
Karin
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