I would like to direct you to
this document on our web site:
There you can find the following note:
"In LabVIEW the storage VIs are found on the file I/O palette; however, if you intend to use the custom properties VI shown above in Figure 4, you find this VI in Storage.llb found at C:\Program Files\National Instruments\LabVIEW 7.1\vi.lib\platform\storage, the VIs name is _saveProperty.vi."
Scott Y
NI