[Boost-users] scope_lock question

I plan to start using Boost Thread, but for now I have a multithreaded Win32 application that does not use boost. Although the threads were not created with Boost Thread, can I use boost::mutex::scoped_lock to protect some new functions I write for the app? Example: boost::mutex mutex; void whatever() { boost::mutex::scoped_lock lock(mutex); // will this be protected even though the // thread was not created using Boost? } Thank you