Outputs a variable parameter list to the specified storage area according to a format.
long vswprintf(wchar_t *restrict s, size_t n, const wchar_t *restrict control, va_list arg);
s Pointer to storage area to which data is to be output
n Number of wide characters to be output
control Pointer to wide string indicating format
Normal: Number of characters converted
The vswprintf function is the wide-character version of the vsprintf function.