How do we specify the target fluid when using ABFLSHdll() in my program?

[TGR203]

We believe that there is ABFLSHdll() as High-Level API on REFPROP Version 10.
How should we specify the fluid to be calculated when using this in a calculation program?

We have checked the manual below, but we couldn’t find any argument in ABFLSHdll() that specifies the fluid.
https://refprop-docs.readthedocs.io/en/latest/DLL/high_level.html#f/_/SETFLUIDSdll
Should we use the included API, SETFLUIDSdll(), to specify the fluid in advance?

[Matthew-Boyd]

Yes, you should use SETFLUIDSdll (or SETMIXTUREdll) beforehand to specify the fluid.