Unimplemented.
int fwide( FILE *stream, int mode; );
Pointer to FILE structure (ignored).
The new width of the stream: positive for wide character, negative for byte, zero to leave unchanged. (This value is ignored.)
This function currently just returns mode.
The current version of this function does not comply with the Standard.
Function
Required header
fwide
<wchar.h>
For more information, see Compatibility.