What are the steps to start the camera??like do we need to create a viewfinder?
I wanna use the video light?
can i use it directly or with min code?
take a look at https://github.com/blackberry/Cascades-Community-Samples/tree/master/HelloCamera
if all you want to do is turn on the led, then you just need to use camera_open() and camera_config_videolight().
Your best bet it certainly to try out the HelloCamera sample;