Hi Adam,
if I understand it right, then you want to readout a waveform from scope. In instrument driver .llb's (from TEKTRONIX) you will find TKTDS read waveform.vi.
This vi outputs the y-values, t0 and delta t.
Then you only need to extract these Data.
Find attached two pic's - first: 2channels of TEKTRONIX TDS7054 are separate read out and then a resulting graph is created (mean between cursors of multiple measurements); second: read entire waveform of selected channel - other options available.
You should have a look to instr. driver of your scope - you will find equivalent vi's.
regards
wha