atlast , thank you for reply but i think you don't understand me
i wanted to make sentry gun aim at target , if target moves than it should rotate also with PEV_CONTROLLER
you can see sentry_turntotarget function which i given , in that sentry tilt to target only Vertically like target move up and down than sentry aim up and down by pev_controller and what i wanted is that sentry tilt target if he moves horizontal (rotating on axis) also by pev_controller