Hi,
You don't need to send any network commands to the GPIB-ENET box. you use the NI-488.2 driver to communicate to the ENET box. The driver handles all the network communication details. Once the interface is configured and appears on the Measurement and Automation Explorer (MAX), you use the standard GPIB functions.
Once you install the driver, you can find Visual Basic examples under the National Instruments/NI-488.2/Language directory.
Hope this helps.
DiegoF
National instruments.