First, the niDCPower_init is unique command to the NI-DCPower driver(IVI instrument specific driver). If you are looking for a driver that will allow you to interchange multiple power supplies then you need an IVI class driver. Meaning you could use a National Instruments power supply one day and some other power supply the next day by making minimal changes to the code.
Hello subhashv and A_Ryan, All of the IVI Class drivers that NI Provides are available in the IVI Compliance Package. More information on IVI drivers can be found at ni.com/ivi.