backcourt violation

[PackersFTW]

you know how in football, to be called for passing beyond the line of scrimmage (IFP), you have to have every single part of your body over the line? if your heel is still on the line of scrimmage, but everything else is in front of it, it still counts as a legal pass.

well, i was wondering how backcourt violation works in the nba. more so, when are you considered to be in the front court? i'm pretty sure it doesn't work like the nfl. i heard one of the bulls announcers say it's where the ball is, but how can that be, because that would mean you could be standing in the backcourt, then reach the ball over the line and pull it back and that would be a backcourt violation. it would also mean that you could be 100% in the frontcourt, and as long as the ball is in the frontcourt, you could touch your foot behind the halfcourt line, which i know you cannot do.