>If it's a vendor-defined command, you need to provide a vendor-defined driver to support it.
I couldn't develop a driver like usbvideo.sys. I just want to extend its functionality which can allow to send control transfer from user space.
My last solution is installing "libusb-win32" as filter driver of usbvideo.sys and I'll use LibUsBDotNet for sending control transfer from my application.
My problem now is to write the corresponding INF file