How to make a Video "mini/filter-driver"

I need to create an application/driver in Windows that captures the video stream from a webcam, performs some modifications and passes it back on to the system (so it streams out to say skype).

Anyone knows how to create / register such an app ? Maybe开发者_如何学运维 samples on the web ?

Thanks in advance

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Look at the DirectShow. You need to create a source filter (which gets data from the camera source filter and modifies it).