Many thanks MarkMLI, I will be more precise.
It's Lazarus under Windows 10 (or Windows 7).
I'm interested in how data from files created by different devices (for example, position or incremental position transducers, temperature transducers, etc.) can be received via USB. Or, after the data has been processed by the computer, how can this data be sent to other devices such as execution elements (eg servo valve, regulators, etc.). Data processing in the computer is made by the same application that will need to execute and receive / send data via USB.