;+
; NAME:
;   DXGET
;
; AUTHOR:
;   Craig B. Markwardt, NASA/GSFC Code 662, Greenbelt, MD 20770
;   craigm@lheamail.gsfc.nasa.gov
;
; PURPOSE:
;   Gets IDL variable from a different IDL call level
;
; CALLING SEQUENCE:
;   RESULT = DXGET('NAME')  ; quoted variable name (OR)
;   RESULT = DXGET(NAME)    ; unquoted variable name
;
; DESCRIPTION: 
;
;   DXGET retrieves a variable value from any point in the IDL call
;   stack.  The DXGET and DXSET routines allow any variable at any
;   level to be examined and changed.
;
;   The call level to be examined is determined by the current
;   debugging "focus."  By default this is the deepest level in the
;   call stack -- where the breakpoint occurred.  However, this level
;   can be changed by using the DXUP and DXDOWN procedures.
;
;   If the variable doesn't exist, then an error message is reported.
;
; INPUTS:
;
;   NAME - the name of the variable, either quoted or unquoted.
;
; KEYWORDS:
;
;   LEVEL - the call level to be examined, if not the current
;           debugging focus.
;
; EXAMPLE:
;
;   value = dxget('a')
;
;   Retrieve the value of the variable A from the debugged call level.
;
; SEE ALSO:
;
;   DXGET, DXSET, DXUP, DXDOWN
;
; MODIFICATION HISTORY:
;   Written, 15 Apr 2000
;
;  $Id: dxget.pro,v 1.2 2001/02/09 04:57:16 craigm Exp $
;
;-
; Copyright (C) 2000, Craig Markwardt
; This software is provided as is without any warranty whatsoever.
; Permission to use, copy, modify, and distribute modified or
; unmodified copies is granted, provided this copyright and disclaimer
; are included unchanged.
;-