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VBoxManage showvminfo

VBoxManage showvminfo  <uuid|vmname> [--details] [--machinereadable]
VBoxManage showvminfo  <uuid|vmname> --log <idx>
VBoxManage showvminfo gives information (such as the settings configured with VBoxManage modifyvm) about a given virtual machine.
This command prints the same information about a particular VM as VBoxManage list vms --long prints about all VMs.
A specific setting can be queried (in a Windows environment) like so: 
VBoxManage showvminfo $vmName | findstr /c:"3D Acceleration"

See also

VBoxManage modifyvm allows to change settings for a virtual machine from the command line.
VBoxManage

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