Functions/Set-Display.ps1
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# Turning off display http://community.idera.com/database-tools/powershell/powertips/b/tips/posts/turning-display-off-immediately # Turning on display https://www.codeproject.com/Articles/11099/Turn-on-off-monitor function Set-Display { <# .SYNOPSIS Set-Display turns the display on or off via energy saver api .DESCRIPTION Set-Display turns the display on or off via energy saver api .EXAMPLE Set-Display -Off | Start-Sleep -Seconds 5 | Set-Display -On .NOTES Set-Display -On seems to NOT work with Windows 10 Update 1909 #> #region Parameter [CmdletBinding(ConfirmImpact='Low',DefaultParameterSetName = 'On')] [OutputType($null)] param ( [parameter(ParameterSetName = 'On')] [switch] $On, [parameter(ParameterSetName = 'Off')] [switch] $Off ) #endregion Parameter Begin { Write-Verbose -Message "Starting $($MyInvocation.Mycommand)" Write-Verbose -Message "ParameterSetName [$($PsCmdlet.ParameterSetName)]" If ($Verbose) { Start-Sleep -Seconds 3 } } process { $code = @' using System; using System.Runtime.InteropServices; public class API { [DllImport("user32.dll")] public static extern int SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam); } '@ $version = Get-CimInstance -ClassName win32_operatingsystem -Verbose:$false if ($PsCmdlet.ParameterSetName -eq 'Off') { if ($version.version -match '^10') { start-process -FilePath (join-path -Path $env:windir -ChildPath 'System32\scrnsave.scr') -ArgumentList '/s' } else { $t = Add-Type -TypeDefinition $code -PassThru start-sleep -seconds 1 $null = $t::SendMessage(0xffff, 0x0112, 0xf170, 2) } } else { if ($version.version -match '^10') { if (get-process -Name scrnsave.scr -ErrorAction SilentlyContinue) { $pidToStop = [array] (get-process -Name scrnsave.scr -ErrorAction SilentlyContinue).id stop-process -ID $pidToStop[0] -Force } } else { $t = Add-Type -TypeDefinition $code -PassThru start-sleep -seconds 1 $null = $t::SendMessage(0xffff, 0x0112, 0xf170, -1) } } } end { Write-Verbose -Message "Ending $($MyInvocation.Mycommand)" } } |