Hello there, I hope this is the place to ask this question ...

I am doing a little project titled Heartbeat Monitor. I have finished my hardware (to detect the ECG signal) and now I just need to connect my circuit to the PC and program away in VB to calculate the heart rate. In order to save cost I would use the PC's sound card as my ADC.

So here are my questions:
1. How do I praogram in VB to use the sound card as an ADC
2. How do I extract that digital data
3. What do I need to do in order to calculate the heart rate

I have some basic knowledge on C++ and a bit familiar with Visual Basic C++, but not familiar with Visual Basic. Anyone could help me out or maybe recommend a good book?

A guy did a project very similar to mine and code the software that can be found on this page. I am rather at a loss in trying to understand his codes.