Back Court vs. Front Court.

[MagnusonX]

This in an age-old question for me. At what point is the ball considered in the front court? Here's a scenario:

Player A dribbles the ball from the back court towards the front court. At the halfway line, he has one foot in the back court and the other in the front court and has stopped. At this point, is the ball considered in the FC or the BC?

OK, let's complicate things further. With one foot in each the BC and the FC, he lifts his BC-side foot. Is he considered in the FC now?

Am I complicating this situation by talking about foot location? Is this supposed to be determined by the ball location instead? In this case, must the whole of the ball cross the halway to be in the front court?