Hello RipGurl, Thank you for contacting National Instruments.
To get immediate access to your data, it would be best to acquire directly from Visual C++ (VC). You can download an example for this from the NI Developer Zone at: http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B45EACE3E9EB56A4E034080020E74861&p_node=DZ52302&p_source=External If you need to use LabVIEW to acquire and log your data, you will not be able to access the data in VC until LabVIEW has finished writing to the file. If you wanted access to the data closer to its time of acquisition, you would have to alter your data logger to write to multiple, smaller files. For example, you could have your data logger write separate files for every 5 minutes of sampling. VC could then read those files as soon as LabVIEW has finished writing them. I hope this helps, Sean C. Applications Engineer National Instruments
