SPOPSEEK()

  Short:
  ------
  SPOPSEEK() Popup seek based on present index keys

  Returns:
  --------
  <lFound> => seek succesful or not

  Syntax:
  -------
  SPOPSEEK([aKeys])

  Description:
  ------------
  Pops up first a box asking for which index selection,
  and when the index key is selected, asks for a value to be
  entered to seek on. Performs a seek and returns <lFound>
  success. The index order is saved and restored.

  [aKeys] is an optional array of current index keys.

  Examples:
  ---------
   IF choice = POP_SEEK
      if SPOPSEEK()
        redrawscreen()
      endif
   ENDIF

  Source:
  -------
  S_PSEEK.PRG