connect two wxRichTextBuffers

[Karol Bielecki]

Sorry.
I don't speak English so difficult explain
> textctrl.GetBuffer().Invalidate(wxRICHTEXT_ALL);
> textctrl.Refresh();

> textctrl.Update();
> 
not work

suposue in budor1 is text "one"
and in bufor2 is text "two"
after all
when I select text "two" by mouse in richtextctrl
in control is select text "two" and "one" at the same time

and when I add
textctrl.AddParagraph("");

everything is ok only I have 1 empty line on end