Aber vermutlich ist es besser, Indy9 zu verwenden, wenn es funktioniert.
Oder
Indy 10, siehe
https://stackoverflow.com/a/72692107/80901:
"Technically yes,
Indy does still include project files for Delphi 4. But, you will have to compile and install them manually,
Indy won't automate that for you. And I offer no guarantees about whether they actually work."