You should use the Active Roles SDK because it provides a number of benefits:
The Active Roles SDK can be found in the Windows Start Menu when installed with the Active Roles Server Administration Service.
Start | All Programs | Quest Software | Quest One Active Roles | SDK and Resource Kit
The SDK for Active Roles 7.x is no longer contained within a stand-alone installer. It is included in the Management Tools component of the Active Roles installer.
The Active Roles SDK can be found in the following locations once installed with the Active Roles Server setup.exe:
C:\Program Files\Dell\Active Roles\7.0\SDK
C:\Program Files\One Identity\Active Roles\7.3\SDK