I have a VirtualBox guest OS that runs a low resolution (lower than resolution of host) full screen program. This is how my screen looks in full screen (host) VirtualBox:
https://postimg.cc/hhq99SHs
I want my mouse cursor to be locked inside white area, because now it doesn't.
Tehnical details:
Host system is Slackware64-14.2
Guest system is Windows 7 x64
Vanilla VirtualBox 5.2.20 from Oracle
Guest additions are installed