StefanM,
Thank you for your question regarding interfacing your Vernier LabPro with LabVIEW. Fortunatly the manufacturer of your instrument provides an instrument driver that is compatible with LabVIEW 6.1 and above. It provides examples and VIs that you can use to interface with your LabPro with LabVIEW. This instrument driver can be found at the following link.
http://www.vernier.com/labview/software/labprotoolkit.html
Shea C
Applications Engineering
NI