Use the NI-DMM Fetch VIs to add low-level control to your application.

niDMM Initiate VI
Initiates an acquisition. After you call this VI, the DMM leaves the Idle state and enters the Wait-For-Trigger state. If trigger is set to Immediate mode, the DMM begins acquiring measurement data.
niDMM Fetch VI
Returns the value from a previously initiated measurement.
niDMM Fetch Multi Point VI
Returns an array of values from a previously initiated multipoint measurement.
niDMM Fetch Waveform VI
Returns an array of values from a previously initiated waveform acquisition. This VI is polymorphic. To change the selected instance of this polymorphic VI, right-click the VI and choose Select Type followed by the waveform data or floating point array version of the VI.
niDMM Read Status VI
Returns measurement backlog and acquisition status.
niDMM Abort VI
Aborts a previously initiated measurement and returns the DMM to the Idle state.
niDMM Control VI
Controls the DMM. Use this VI if you want a parameter change to be immediately reflected in the hardware. Use this VI before calling niDMM Initiate to make the initiate call as quickly as possible. Calling this VI while the DMM is taking measurements results in an error. After the DMM is finished taking measurements, calling this VI will make any unfetched data points unavailable.

Parent topic: Acquisition

NI-DMM LabVIEW VI Reference