Alesya,
You can use NI-DAQ 6.9.3 with LabVIEW 7.0. You will need to download the NI-DAQ 6.9.3 support for LabVIEW 6.1. During the installation of NI-DAQ 6.9.3, you should include support for LabVIEW 6.1 and change the installation location of this support to the LabVIEW 7.0 folder on your computer. If you follow this procedure, you should be able to use your Lab-PC+ with LabVIEW 7.0.
Good luck with your application.
Spencer S.