Newbie: spotlight shadow ?

Hello you people !

Could you tell me where is the button to make a spotlight cast shadow
in game engine…
I mean, there’s a spot , a ball, a plane under the ball and i would be very
happy to have the shadow of the ball on the plane.

The gameengine can’t produce shadows. You have to make them yourself.

Do you mean i have to make some kind of circle parented to the ball ?
Or is there a python script to do that ?

you could make a texture with a shadow on it. The problem is to have it respond and move to the lights. Don’t know if someone has a script that do that.