control. In other words, it allows to limit the text value length to {\it len}
not counting the terminating {\tt NUL} character.
+If {\it len} is $0$, the previously set max length limi, if any, is discarded
+and the user may enter as much text as the underlying native text control
+widget supports (typically at least 32Kb).
+
If the user tries to enter more characters into the text control when it
already is filled up to the maximal length, a
{\tt wxEVT\_COMMAND\_TEXT\_MAXLEN} event is sent to notify the program about it