If you are interested in a UI for modifying options within the INI file, check out this toolkit released by NI. It's basically the same interface you see when editing the LabVIEW options. It may be a bit overkill for some applications but it's still worth the effort to review the code and maybe find some inspiration inside.
Options Dialog Framework
aputman
LabVIEW 2017
LabVIEW Programming
