How can I intercept register operations (i.e. viIn16) in software?

[Believer]

Using IVI I am able to use a virtual serial port as a device and so emulate the hardware.

Any SCPI commands which are sent from the IVI driver end up in my virtual serial port handler and I can respond to them as needed in software.

This is basically working as a device emulator.

All is well, until a register based operation is performed on my virtual device.

A viIn16 for example is flat out rejected by VISA saying: "The given session or object reference does not support this operation".

True enough - a serial port does not support it.

So, does anyone know of a way to intercept register based operations in software, which would allow specific software responses to be defined?

Thanks!

[Believer]

Since there are no replies, I am going to post this message in a more relevant forum.