Hey Guy04,
Since LabVIEW does not have traditional function calls like C or C++ ( func(int a) ), this property is actually not supported for the LabVIEW adapter. For most other adapters, this option can be set by going to Configure>>Adapters, select the adapter, and click configure. If the option is possible, there is a checkbox to show the function arguments in the description.
Pat P.
Software Engineer
National Instruments