Hi
I don't see in your post if you're using a NI scope or a third party scope.
If you're using a NI scope, then check the examples which are installed with the scope driver. This will give you an idea in how to use the scope. You'll find here a quick reference which explains the NI-Scope functions. Check page 8 for the dataflow:
http://digital.ni.com/manuals.nsf/webAdvsearch/7C7DFC3C6DC47D4286256846005F21F5?OpenDocument&vid=niwc&node=132100_US
If you're using a third party scope, then check if you find a LV driver. This will help you programming your device.
http://www.ni.com/devzone/idnet/default.htm
Hope this helps
Luca
Regards,
Luca