you are talking about unattended setup of notepad++, don’t you?
If this is the case then , afaik, npp doesn’t support silent installation flags
but this doesn’t mean you can’t do it.
If you download the npp source from github you will see that it includes an installer directory
under PowerEditor. You can modify the nsis scripts to your needs and build everything.
Or, do you know this?
Or what about using a zipped version and simply unpack it.
Or use one of the install recorders available on the web to record file and registry changes.
Use it as a model and write some scripts to automate the installation.
If your question was not about this topic, then you need to clarify what you want.