I have a USBTMC device prototype In VB.net (with VISA-COM 5.0 library reference), I can open a session using: Dim manager as New Ivi.Visa.Interop.ResourceManager Dim session as Ivi.Visa.IMessage = manager.Open(<valid resource name>) I wanted to get a list of available USB resources using FindRsrc method (manager.FindRsrc("USB0::?*")). I was… Show more

Hi Rannie, In case you do not have solution yet, you could try "USB0?*" "USB0::?*". Here is a good reference I found online Finding VISA Resources Using Regular Expressions - NI-VISA 15.0 Help - National Instruments Regards, Eagle8305