How do I convert wchar_t* to std::string?

Question

I changed my class to use std::string (based on the answer I got here but a function I have returns wchar_t *. How do I convert it to std::string?

I tried this:

Answer 1

Following code is more concise:

wchar_t wstr[500];
char string[500];
sprintf(string,"%ls",wstr);