A text-to-speech engine that accesses .lib files using dynamic link libraries (DLLs). DLLs are software modules in Microsoft Windows operating environments that contain executable code and data that can be called and used by Windows applications or other DLLs. Functions and data in a DLL are loaded and linked at run time when they are referenced by a Windows application or other DLLs. DLLs can be unloaded when the code is no longer needed.