i would like to open files like Billy MP3 Player does.
Whenever i double-click a music file from Explorer, it opens and plays the file, but ALSO adds all other files in that folder to the Playlist.
Can this behaviour be adopted to foobar2000?
You can go to the folder, right-click and chosse 'Enqueue in foobar2000' or 'Play in foobar2000'.
Not exaxctly the same, but similar.
I think you cannot do this with a portable install? (And, must one configure some shell integration under Preferences? Don't remember, long time since I did.)
I didn't configure anything like that. It's standard.
Portable install doesn't add anything to the explorer context menu.
I've added a batch file to each folder that tells foobar to open the current folder.
start "Play Folder" /d "%cd%" /b "C:\Other\apps\foobar2000\foobar2000.exe" "%cd%"
It works well, and is easier than creating a playlist for each folder.
Why make things complicated? The OP didn't talk about a portable 'install'.