set-label-position in area-container-window<%>
Sets the arrangement of labels, 'horizontal (to the left
of the control) or 'vertical (above the control), for
radio boxes, choice items, list boxes, text fields, sliders and
gauges. Button and check box labels are not affected.
Only controls and sub-containers created after the call to
set-label-position are affected. When a child container window is created, it inherits
the label position setting of its parent. Horizontal label placement
is the default placement for a top-level window.
( -> void
send an-area-container-window set-label-position position)
position : symbol in '(horizontal vertical)