Tram,
To find the area under the curve, you can use the Integration Metods located in the Calculus class (part of NationalInstruments.Analysis.Math namespace as long as you have Professional or Enterprise Edition). The PeakDetector class would probably be best for finding the peak position. This is located in the NationalInstruments.Analysis.Monitoring namespace with Professional and Enterprise editions.
Also, are you using hardware with this to get these pulses? If so, is it our hardware? If it is, it sounds like you would just want to use the DAQmx driver for the rest of your inquiries. If you are already using the DAQmx driver, the help can be found if you go to the
Start Menu>>All Programs>>National Instruments>>NI-DAQ>>NI-DAQmx .NET Framework 2.0 Help.
The help for these Analysis functions can be found either through the Visual Studio help, or by going to
Start Menu>>All Programs>>National Instruments>>Measurement Studio 8.x for Visual Studio .Net 2005>>Measurement Studio Documentation.