Before everything, i thanks you by advance.
I try everything to install Vbox guest additions. I installed 5.2.2, not worked, after that installed 6.0 not worked too.
guest : Windows7 64bits
host: Debian stretch 9.5
No screen resize, no drag&drop, no clipboard.
I read probably every doc on the subject, & and i watched probably every yt videos.
If someone, by any chance, know where is my problem.
Thanks all,
best