Take a look at the OnTrackingFound method in the DefaultTrackableEventHandler. This method is fired whenever a target is detected. You can extend this method, or implement your own custom event handler by implementing the ITrackableEventHandler interface.
Also the Video Playback sample demonstrates exactly what you're describing.
Take a look at the OnTrackingFound method in the DefaultTrackableEventHandler. This method is fired whenever a target is detected. You can extend this method, or implement your own custom event handler by implementing the ITrackableEventHandler interface.
Also the Video Playback sample demonstrates exactly what you're describing.