+ wxBitmapToggleButton is a wxToggleButton that contains a bitmap instead of
+ text.
+
+ This class is not available in all ports currently (although it is
+ available in the major ones), test for @c wxHAS_BITMAPTOGGLEBUTTON to
+ determine whether it can be used (in addition for possibly testing for
+ @c wxUSE_TOGGLEBTN which can be set to 0 to explicitly disable support for
+ this class and wxToggleButton).