Current Delphi software worked perfectly with Phidget21 since many, many years, until recently with Win10-LTSC where it cannot load ActiveX DLL, due to missing dependencies.
We are wondering if we have to rewrite the code to use Phidget22,
but so far no idea yet how to proceed.
I would start by trying to get some of our Phidget22 .Net code samples working in Delphi, per Patrick's suggestion. Once you get that working, you can convert your old Phidget21 code to Phidget22. There's a guide on what changes to look out for here.