How to measure Oscilloscope differential probe measure

[hiawath]

Dear Sir,

I was sucess with VB-8012 with DLL for the measure single probe (GND reference).

Now I try to measure with Differential measurements.

I found "MSO_ConfigureAnalogChannel", I can use "mso/1:2".

This is only I know, Can anybody advice how to prepare for measring the Differential measurements.

Thanks

Andrew. Han