// Return if a give course uses a given control.
public static bool CourseUsesControl(EventDB eventDB, CourseDesignator courseDesignator, Id<ControlPoint> controlId)
{
eventDB.CheckControlId(controlId);
foreach (Id<CourseControl> courseControlId in EnumCourseControlIds(eventDB, courseDesignator)) {
if (eventDB.GetCourseControl(courseControlId).control == controlId)
return true;
}
return false;
}