The GetDriverController method lets you get the driver controller of a system. It is available in 3ds Max 9 and higher.
GetDriverController <System>
Returns the driver controller of a system (for example RingArray, Sunlight System etc.)
Note: Prior to 3ds Max 2022 this method was called GetMasterController().
EXAMPLE
--First create a Sunlight System using the UI. --Then get its driver controller: theDriver = GetDriverController $Sun01 ReferenceTarget:Sunlight show theDriver .Solar_Time : integer .Solar_Date : float .Latitude : float .Longitude : float .Orbital_Scale : float false