Get UUID on Windows

gistfile1.cpp

#include <Rpc.h>
#pragma comment(lib, "Rpcrt4.lib")

static string get_uuid()
{
	string rtn;
	UUID uuid;
	UuidCreate(&uuid);
	char *str;
	UuidToStringA(&uuid, (RPC_CSTR*)&str);
	rtn = string(str);
	RpcStringFreeA((RPC_CSTR*)&str);
	return rtn;
}