You probably could via ActiveX, but I think a better solution would be to get the data from LabVIEW in the first place and then save it in spreadsheet format from there. This would eliminate the hassle of trying to use the ActiveX interface to fiddle with the toolbar. You can get drivers for that instrument
here.
As for the Matlab stuff you can have LabVIEW call the Matlab script directly once you've saved the data, or you can use Mathscript. If the code isn't that complicated you can probably rewrite it in G, and you have an all-in-one solution that doesn't deal with several different applications.
Just a thought.