Hi,
It is very unlikely that the library will help you import data into DIAdem, since DIAdem has it's own data management interface and doesn't use the VB interface to access data files.
If you have a description of the NRF file format and a few data files (for testing the filter), please upload them or send them to my email address:
otmar.foehner@ni.com
and I can look into how much effort it would be to create a file import DLL for DIAdem to access this data format.
Otmar
Otmar D. Foehner