Hello Pooly, and welcome to Seven Forums.
You can get the PID number for your webcam in Device Manager (devmgmt.msc). In Device Manager double click on your webcam device to open it's Properties page, click on the Details
tab, select Hardware Ids
, and you will now see the PID number like in the screenshot below of my webcam.
A PID number displays in the format: USB\VID_<num>&PID_<num>\<Serial No. of the device>
Hope this helps,