A wx:button-bar% object is very similar to a wx:tool-bar% object, but is optimized for use under Windows, giving a more attractive appearance and better feedback. This class is only implemented for Windows.
If x, y, width, or height is -1, an appropriate default position/size will be used.
The style argument is reserved for future use.
The orientation argument can be wx:const-vertical for a vertical toolbar or wx:const-horizontal toolbar. For a horizontal toolbar, n-rows-or-columns specifies the number of tools to place vertically adjacent before moving to the next column when using automatic placement.