Finding Child coordinates relative to parent?

Function CreateBullet.Bullet( p.Player, w.Weapon, gun$ )
  
		b.Bullet=New Bullet
		b\shooter = p\entity

		weapon = FindChild(p\entity, gun)
		b\sprite=CopyEntity( bullet_sprite, weapon ) 
                PositionEntity b\sprite, EntityX(gun,True), EntityY(gun,True), EntityZ(gun,True), True
	
		b\speed = w\speed

	        MoveEntity b\sprite, 0,0,(b\speed*FL\SpeedFactor)*5
		EntityParent b\sprite,0
		EmitSound shoot,b\sprite
		Return b
		
End Function