Oracle VirtualBox: Host key

Pressing the host key un-captures the keyboard (and the mouse?). (With a captured keyboard, all keyboard events, even alt/tab, go to the guest OS.

Assigning a host key

The currently assigned host key is shown in the in the bottom-right corner of the VM window:

The virtual key code of the host key can be displayed on the command line with

VBoxManage.exe getextradata global GUI/Input/HostKeyCombination

The following PowerShell command assigns F12 as host key:

VBoxManage.exe setextradata global GUI/Input/HostKeyCombination 123