capture audio from windows media center

We hace a ceton PCIe InfiniTV6. We would want to capture the audio of 6 channels programmatically using visual C++ 10. It must run under windows 7 64bits. The goals are: 1. programmatically set up the 6 channels we would want to grab. 2. uncompress audio data on the fly, while saving into a file. 3. we need the source code to integrate it into a larger application.