RE: [Libusb-win32-devel] usb_set_configuration error

[Dan E. <Dan...@ne...>]

Andrew Xiang wrote:
> How come there is not control message going to the USB device when
> doing usb_set_configuration???=20

There is a control message going to the USB device, but windows doesn't
allow it to be sent directly, since changing the configuration of a
device is something which must be administered by the stack, so is done
differently than normal control messsages.

The DeviceIOControl call tells the driver to tell the USB stack to
change the configuration.

Dan.