SignalExpress is a data acquisition software package that is ready-to-run. It allows you to easily take data, analyze it, and store it without writing any code. It can generate code into LabVIEW of most projects you create. If SignalExpress supports the measurement you wish to take, it is easier to use than LabVIEW for data acquisition. Unfortunately, SignalExpress does not directly support integration. You would need to create a LabVIEW plugin for it to do this. At that point, it is easier to use LabVIEW, which does have integration functions.
My recommendation is to use LabVIEW for you problem. Take your raw data (the DAQ Assistant makes this fairly easy), then use one of the integration subVIs to do your integration. It is much easier to tweak integration parameters in software than in hardware.
If you need further help, let us know. LabVIEW ships with lots of examples, so there is no need to start your project from scratch. Look through them, pick one that is close to what you want, and modify it to finish up. Good luck!
