I am working on a Qt based application to interact with Lego Ev3 Mindstorm.

I am working on Windows 10 platform using Qt 5.14 and Visual Studio 2017;

I know the brick has a valid USB connection because the Lego application can control it.

I have tried using libusb but the bulk_transfer apparently is not supported on Windows. I can connect to the device in libusb but the transfer always fails.

I also tried hidapi. again I can connect to the device but canont write to it.

Is there a library that is known to work with Qt and windows USB devices?

Bruce