void Acquire()
The OETryMutex::Acquire method acquires (locks) the OETryMutex. If
the OETryMutex is unlocked, it is locked by this calls and becomes owned
by the calling thread. If the OEMutex is already locked, by this or
another thread, OETryMutex::Acquire suspends the calling thread until the
OETryMutex is released.