+The other cases are not currently supported and \texttt{wxCONV\_FAILED}
+(defined as $-1$) is returned for them.
+
+
+\membersection{wxMBConv::ToWChar}\label{wxmbconvtowchar}
+
+\constfunc{virtual size\_t}{ToWChar}{\param{wchar\_t *}{dst}, \param{size\_t }{dstLen}, \param{const char *}{src}, \param{size\_t }{srcLen = wxNO\_LEN}}
+
+The most general function for converting a multibyte string to a wide string.
+The main case is when \arg{dst} is not \NULL and \arg{srcLen} is not
+\texttt{wxNO\_LEN} (which is defined as \texttt{(size\_t)$-1$}): then
+the function converts exactly \arg{srcLen} bytes starting at \arg{src} into
+wide string which it output to \arg{dst}. If the length of the resulting wide
+string is greater than \arg{dstLen}, an error is returned. Note that if
+\arg{srcLen} bytes don't include \NUL characters, the resulting wide string is
+not \NUL-terminated neither.
+
+If \arg{srcLen} is \texttt{wxNO\_LEN}, the function supposes that the string is
+properly (i.e. as necessary for the encoding handled by this conversion)
+\NUL-terminated and converts the entire string, including any trailing \NUL
+bytes. In this case the wide string is also \NUL-terminated.
+
+Finally, if \arg{dst} is \NULL, the function returns the length of the needed
+buffer.
+
+\wxheading{Return value}
+
+The number of characters written to \arg{dst} (or the number of characters
+which would have been written to it if it were non-\NULL) on success or
+\texttt{wxCONV\_FAILED} on error.