Freezes the window or, in other words, prevents any updates from taking place
on screen, the window is not redrawn at all. \helpref{Thaw}{wxwindowthaw} must
be called to reenable window redrawing. Calls to these two functions may be
-nested.
+nested but to ensure that the window is properly repainted again, you must thaw
+it exactly as many times as you froze it.
This method is useful for visual appearance optimization (for example, it
is a good idea to use it before doing many large text insertions in a row into