How to find whether a string is guid in c++

Question

How to find whether a string is guid in native c++? a code sample would help greatly

Answer 1

If you need to do it by hand (information from wikipedia):

1. Check the length (36, including hyphens)
2. Check that the hyphens are at the expected positions (9-14-19-24)
3. Check that all other characters are hexadecimal (isxdigit)