Suspend or hibernate from PowerShell

Hope you find these useful.

Shutdown %windir%\System32\shutdown.exe -s

Reboot %windir%\System32\shutdown.exe -r

Logoff %windir%\System32\shutdown.exe -l

Standby %windir%\System32\rundll32.exe powrprof.dll,SetSuspendState Standby

Hibernate %windir%\System32\rundll32.exe powrprof.dll,SetSuspendState Hibernate

EDIT: As pointed out in comment by @mica, the suspend (sleep) actually hibernates. Apparently this happens in windows 8 and above. To 'sleep', disable hibernation OR get an external Microsoft tool (not built-in) "One of Microsoft's Sysinternals tool is PsShutdown using the command psshutdown -d -t 0 it will correctly sleep, not hibernate, a computer" Source: https://superuser.com/questions/42124/how-can-i-put-the-computer-to-sleep-from-command-prompt-run-menu

You can use the SetSuspendState method on the System.Windows.Forms.Application class to achieve this. The SetSuspendState method is a static method.

[MSDN] SetSuspendState

There are three parameters:

• State [System.Windows.Forms.PowerState]
• Force [bool]
• disableWakeEvent [bool]

To call the SetSuspendState method:

# 1. Define the power state you wish to set, from the
#    System.Windows.Forms.PowerState enumeration.
$PowerState = [System.Windows.Forms.PowerState]::Suspend;

# 2. Choose whether or not to force the power state
$Force = $false;

# 3. Choose whether or not to disable wake capabilities
$DisableWake = $false;

# Set the power state
[System.Windows.Forms.Application]::SetSuspendState($PowerState, $Force, $DisableWake);

Putting this into a more complete function might look something like this:

function Set-PowerState {
    [CmdletBinding()]
    param (
          [System.Windows.Forms.PowerState] $PowerState = [System.Windows.Forms.PowerState]::Suspend
        , [switch] $DisableWake
        , [switch] $Force
    )

    begin {
        Write-Verbose -Message 'Executing Begin block';

        if (!$DisableWake) { $DisableWake = $false; };
        if (!$Force) { $Force = $false; };

        Write-Verbose -Message ('Force is: {0}' -f $Force);
        Write-Verbose -Message ('DisableWake is: {0}' -f $DisableWake);
    }

    process {
        Write-Verbose -Message 'Executing Process block';
        try {
            $Result = [System.Windows.Forms.Application]::SetSuspendState($PowerState, $Force, $DisableWake);
        }
        catch {
            Write-Error -Exception $_;
        }
    }

    end {
        Write-Verbose -Message 'Executing End block';
    }
}

# Call the function
Set-PowerState -PowerState Hibernate -DisableWake -Force;

Note: In my testing, the -DisableWake option did not make any distinguishable difference that I am aware of. I was still capable of using the keyboard and mouse to wake the computer, even when this parameter was set to $true.