controlled by the same person that uses the virtual machine.
VBoxSDL does indeed only provide a simple window that contains only the “pure” virtual machine, without menus or other controls to click upon and no additional indicators of virtual machine activity
To start a virtual machine with VBoxSDL instead of the VirtualBox GUI, enter the following on a command line
VBoxSDL -vm <vm>
where <vm> is, as usual with VirtualBox command line parameters, the name or UUID of an existing virtual machine.
VBoxSDL current valid key bindings are as follows
<hostkey> + f Switch to full screen / restore to previous view
h Press ACPI power button
n Take a snapshot and continue execution
p Pause / resume execution
q Power off
r VM reset
s Save state and power off
<del> Send <ctrl><alt><del>
<F1>...<F12> Send <ctrl><alt><Fx>