Program to run my webcam

Hi everyone, I want to write a program that is going to turn on my webcam and then display whatever the webcam is pointing at on the app. But frankly, I have no idea where to start. But I am more interested in knowing how I can get a video recording as input from the webcam to one of the program functions, because I suppose that is what should happen. Any input will be greatly appreciated.
This is kind of complicated for a forum. You could check out OpenCV and see if that meets your needs. They have tutorials and code samples on their site.
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