Description
The entry and listbox popup share the same horizontal scrollbar behavior.
When one has a horizontal scrollbar, the other does as well.
When 'ondemand' is requested, the horizontal scrollbar only appears when
the number longest item is longer than entrywidth elements. When
'always' is requested, the horizontal scrollbar is always present. When
'none' is requested, there is no horizontal scrollbar and
the listbox is always wide enough to show all of the items in
the combobox.
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2006-10-15