How do you use DMA with mbSession.ReadByteArray to improve data capture speed?

Hello,

I am working on a C# program that captures data from a Spectrum Analyer via GPIB.  We use a NI GPIB-USB-HS adapter with NationalInstruments.Common Ver 8.5.20.149 and NationalInstruments.VisaNS ver 8.5.20.310.  We use mbSession.ReadByteArray to capture the trace data directly into an array, but need to reduce the capture time.  Can someone direct me to documentation detailing the necessary steps that I should take in order to use DMA for this data transfer, or even detail them here if that would be easier.

Thanks,

-David