Developers writing drivers or firmware for vendor specific devices can use USBTrace’s vendor specific class decoder to capture, decode and display vendor specific requests. The vendor specific class decoder allows you to write and install your own class decoder DLL.
In addition to decoding control transfers, you can also decode bulk, interrupt and isochronous requests from your decoder DLL.
To know more about writing your own class decoder DLL, look here.
You can download an evaluation version of USBTrace, the USB analyzer software, along with class decoders from http://www.sysnucleus.com/usbtrace_download.html
