This function is Hardware-specific implementation. It is not implemented in this Compiler.
#include <stdlib.h>
int mbtowc(wchar_t *wc, const char *s, size_t n);
mbtowc() converts a multi-byte character s to a wide character code wc. Only the first n bytes of *s are taken into consideration.
The number of bytes of the multi-byte character converted (size_t) if successful or -1 if an error occurred.