This paper is a report for the Postgraduate course Language and Speech Engineering. The report describes the part work of InfoVOX project, the goal is to implement Speech Recognition Engine (SRE) on Windows with state-of-the-art SR technologies, and integrate SRE in IVR (interactive voice response) system. Most of SR algorithms are developed on UNIX for research in IDIAP. But the mature PC market requires IVR systems support Windows.