Is there AnimateObjectstop(0,2,0,0); ?
what exactly are you wanting to accomplish?
There is a StopObjectMoving, but that appears to stop MOVING an object not ANIMATING an object. If that's what you mean you could try it.
not ANIMATING what does that one look like ?
So you want to stop an object animating? I think you would just use AnimateObject(0,2,0,0); If the framerate is 0, the object will finish animating instantly. Also, I think SetObjectFrame would work.
Also, you can use the SetObjectGraphic(object_number, sprite_number) function to stop its animating.
It's actually not a bad idea to have some sort of a StopAnimating function.