+ By default, i.e. if none of the alignment styles are specified, the label
+ is centered both horizontally and vertically. If the button has both a
+ label and a bitmap, the alignment styles above specify the location of the
+ rectangle combining both the label and the bitmap and the bitmap position
+ set with wxButton::SetBitmapPosition() defines the relative position of the
+ bitmap with respect to the label (however currently non-default alignment
+ combinations are not implemented on all platforms).
+