Inputs data from a stream input/output file and converts it according to a format.
long vfwscanf(FILE *restrict fp, const wchar_t *restrict control, va_list arg);
control Pointer to wide string indicating format
Normal: Number of data items successfully input and converted
Abnormal: Input data ends before input data conversion is performed: EOF
The vfwscanf is the wide-character version of the vfscanf function.