Hi @Kawai The WF API should work from VBA as well from Python. I don't know VBA, but you might have to use the following to pass array pointer: Call FDwfDigitalOutDataSet(hdwf, 7, rg(0), 9) This VBA project might be useful: https://shop.trenz-electronic.de/en/Download/?path=Digilent/27069-Analog Discovery 2