Hello Andrew,
The RadWebCam component is a media capture and display component, which connects to the camera device and collects/displays the video feed. The QR/Barcode scanning includes a content recognition and processing which goes outside of the fundamental idea of the web camera element.
What I think would be a more applicable solution here is for the RadWebCam to allow you collect the video frames and then process them using a QR/Barcode reading library (like ZXing.Net or similar). Currently, the frames collection is not possible, but if such solution would work for you, there is a feature request for this which you can follow.
In the meantime, an idea that you can explore is to implement a very basic image reading that shows the video device feed, so you can have access to the read frames. And then, add logic for reading the barcodes. I've attached a small sample showing one way to do this using the ffmpeg framework along with zxing.net.
Regards,
Martin Ivanov
Progress Telerik