Similar to the standard function {\it sprintf()}. Returns the number of
characters written, or an integer less than zero on error.
-Note that if {\tt wxUSE_PRINTF_POS_PARAMS} is set to 1, then this function supports
+Note that if {\tt wxUSE\_PRINTF\_POS\_PARAMS} is set to 1, then this function supports
Unix98-style positional parameters:
\begin{verbatim}