title: Detecting screen/ application updates with python on windows
body: <p>Currently I have to check cameras everyday at work, over 400 of them. I would like to automate this task. i know python is great for automation but I'm not seeing a solution, maybe my google-fu isn't good enough, I'm not sure. </p>
  
  <p>Basically I just want to be able to detect when certain parts of the screen update and then use that info to fill an excel sheet. I don't want to plug into the application if possible.</p>