That did it! Thank you!

I'm still kinda scratching my head here, since the function call is modifying the string, wouldn't you need to pass it byref?

Either way, thank you very much! It's working!

Hello. I'm having some issues communicating with our PT-104A via VB.NET. I get the correct PICO_STATUS back from the UsbPt104OpenUnit() call (0-"PICO_OK"), but when I try to call UsbPt104GetUnitInfo, it immediately exits the sub without even throwing an error. I'm using the 32bit SDK as my end appli...