title: webcam access in c++
body: <p>I want to access the webcam so I can do some precessing on the images, like tracking a light, but I can't find a way to access the webcam. I googled it but I got confused.</p>
  
  <p>Can you point me to a library that can do that (windows)? and maybe also provide an example?</p>
  
  <p>I would need to periodically get a pixel map of the image, about 20 time per second or so if it would be possible.</p>