Hi Vincent,
There is no way to programmatically change the names of a device in Visual Basic. There is a property called DaqSystem.Devices that will give you access to an array of the devices that are installed on the system but this is a read only property. However, when you installed DAQmx, Measurement and Automation Explorer (MAX) also installs in your system. This program allows you to configure and check the functionality of the hardware insalled. I still think that changing the name in MAX would be the best way to do it for you application. Once you change the device names to something that you want, you can use any of the functions to create a channel out of the device and use the name that you configured in MAX. Hopefully this information is helpful!
Regards,
Vanessa L.
Applications Engineer
National Instruments