I assume that you are not getting any timing information back when calling the DLL.
You can use the �Get Date/Time In Seconds� function next to the Call Library Function Node to register when the DLL was called.
Use the �Build Waveform� function to bundle the start time (t0), the sampling interval (dt) and the data array into a Waveform data type. You can then display this by using a Waveform Graph.
See the attached �TimingInfo.GIF� for an explanation.
- Philip Courtois, Thinkbot Solutions