Use NI-DCPower VIs to create applications for your NI-DCPower instruments.

niDCPower Initialize With Independent Channels VI
Creates a new NI-DCPower session to the specified instrument(s) and channel(s) and returns a session handle to be used in all subsequent NI-DCPower VI calls.
niDCPower Close VI
Closes the session specified in instrument handle and deallocates the resources that NI-DCPower reserved.
Source
Use the NI-DCPower Source VIs to configure the source unit.
Measure
Use the NI-DCPower Measure VIs to configure the measure unit and acquire measurements.
Control
Use the NI-DCPower Control VIs to control the channel(s) in the session.
Triggers and Events
Use the NI-DCPower Triggers and Events VIs to configure triggers and events.
niDCPower Property Node VI
Sets or gets properties of instruments or channels. For multi-channel sessions in which you want to configure subsets of channels differently, you must wire an Active Channel of an NI-DCPower property node. The Active Channel is listed first in the property node.
Query
Use the NI-DCPower Query VIs to query information about the capabilities and state of the device.
Calibration
Use the NI-DCPower Calibration VIs to perform a self calibration or an external calibration on the device.
Utility
Use the NI-DCPower Utility VIs for miscellaneous functionality.

NI-DCPower LabVIEW VI Reference