+\constfunc{bool}{IsOk}{\void}
+
+Returns \true if the charset (or the encoding) given at constructor is really
+available to use. Returns \false if ISO 8859-1 will be used instead.
+
+Note this does \emph{not} mean that a given string will be correctly converted.
+A malformed string may still make conversion functions return \texttt{wxCONV\_FAILED}.
+
+\newsince{2.8.2}