Hand on Ball is Slapped During Shot

[cmcramer]

Could someone please clarify this situation for me?

Defender slaps the hand of the offensive player while the hand is on the ball, during the shooting motion. (ie., Defender 'strips' ball from shooter as shooter raises ball up for a pull-up jumper. Contact is with all hand and ball - no wrist or arm.)

Is this a foul? I was gonna say "no" until I did a search here and found this quotation from a "most misunderstood rules" thread

"Hand is Part of the Ball- the D can always legally contact the O hand if the hand is in contact with the ball. However, it is widely accepted that a foul shall be called on a shot."

Now I'm confused! Thank you!