Hello,
This is pretty straightforward--the waveform datatype is a special datatype that contains three main components: the t0 (initial time), the delta t (space between points), and a 1-d array of the Y-values of the waveform. To access this array, simply use the Get Waveform Components function on the waveform to access the 1-D array. It's located in the Programming » Waveform palette in LabVIEW8.
--Paul Mandeltort
Automotive and Industrial Communications Product Marketing