Hi,
The NI-488.2 driver does not come with a language interface for Delphi. It does come with some Delphi examples using irect entry. You can find these examples under C:\Program Files\National Instruments\NI-488.2\Languages\Delphi.
Another alternative is using the Language interface files available on the web:
GPIB language interface filesYou can find Delphi files and examples under Pascal. This are unsupported (obselete) language interfaces.
Hope this helps.
DiegoF