Error Handling

Is there any resource in the documentation/threads or plugins that I could be directed towards for error handling?

I've been trying to google but only finding errors people have had with NSIS installers not implementing error handling

I'm talking install/uninstall abort/fail handling

In built function errors

non-happy paths etc

Would it mostly be including Detailprint around functions and making macros?

What kind of resources are there for verifying files installed correctly etc

Most functions set the error flag and you can check that with IfErrors or ${If} ${Errors}

Thanks. even having the right terms to google is much appreciated.