-Styling attributes are represented by three classes: \helpref{wxTextAttr}{wxtextattr}, \helpref{wxTextAttrEx}{wxtextattrex} and \helpref{wxRichTextAttr}{wxrichtextattr}.
-wxTextAttr is shared across all controls that are derived from wxTextCtrlBase and
-can store basic character and paragraph attributes. wxTextAttrEx derives
-from wxTextAttr and adds some further attributes that are only supported
-by wxRichTextCtrl. Finally, wxRichTextAttr is a more efficient version
-of wxTextAttrEx that doesn't use a wxFont object and can be used to
-query styles more quickly. wxTextAttrEx and wxRichTextAttr are largely
-interchangeable and have suitable conversion operators between them.