From what i understand if you want the camera to respond to use input or just turn by itselfs you would put the following code in the main loop. The first two examples will show how to constantly move the camera, using turn camera which is free from any axis so allowing 360 degrees rotation. The third example is how to handle a keypress and rotate the camera accordingly.
dbTurnCameraRight (20.0f)
if (dbLeftKey())
dbTurnCameraLeft (20.0f)
You can tweek the code to suit your purposes eg change 20.0f to 10.0f for slower rotation, but if you need any more help or it isnt what you wanted say so