Creating a GUID from C++

How to create a GUID:

#include <iostream>
#include <objbase.h>

int main (int argc, char **argv)
{
   char      szGUID[] = "(XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX)";
   const int GUID_LEN = sizeof(szGUID)/sizeof(szGUID[0]);
  
   GUID g;
   CoCreateGuid(&g);
   wchar_t szwGUID[GUID_LEN];
   ::StringFromGUID2(g, szwGUID, GUID_LEN);
  
   wcstombs(szGUID, szwGUID, GUID_LEN);
   std::cout<<szGUID<<std::endl;

   return 0;
}