widget to select variable

[woodford(at)EssexCorp.com (Woodford, Paul)]

I am searching for a widget that will let you select a variable, just as
dialog_pickfile lets you select a file.  I would like to be able to select
a variable from the current workspace or from a save file.  Does such a
beast exist?  Insight has a widget which lets you import IDL variables,
but I could not find the source.  I have some vague ideas of how it could
be done, but I'd rather avoid the pain.

-- 
Paul Woodford
woodford@essexcorp.com