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.)
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