Functions/Set-Display.ps1
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function Set-Display { <# .SYNOPSIS Set-Display turns the display on or off via energy saver api. Can also set display brightness .DESCRIPTION Set-Display turns the display on or off via energy saver api. Can also set display brightness .PARAMETER On Switch to turn the display on .PARAMETER Off Switch to turn the display off .PARAMETER Brightness [int] representing the brightness. Valid range 1-100 .EXAMPLE Set-Display -Off ; Start-Sleep -Seconds 5 ; Set-Display -On .EXAMPLE Set-Display -Brightness 75 .NOTES Inspired by # 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 # Brightness https://winaero.com/change-screen-brightness-windows-10/ #> #region Parameter [CmdletBinding(ConfirmImpact = 'Low', DefaultParameterSetName = 'On')] [OutputType($null)] [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSReviewUnusedParameter', '')] [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseShouldProcessForStateChangingFunctions', '')] [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSAvoidUsingWMICmdlet', '')] param ( [parameter(ParameterSetName = 'On')] [switch] $On, [parameter(ParameterSetName = 'Off')] [switch] $Off, [parameter(ParameterSetName = 'Brightness')] [validaterange(1,100)] [int] $Brightness ) #endregion Parameter begin { Write-Verbose -Message "Starting [$($MyInvocation.Mycommand)]" Write-Verbose -Message "ParameterSetName [$($PsCmdlet.ParameterSetName)]" If ($Verbose) { Start-Sleep -Seconds 2 } $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); } '@ } process { $version = Get-CimInstance -ClassName win32_operatingsystem -Verbose:$false switch ($PsCmdlet.ParameterSetName) { 'Off' { if ($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 = $t::SendMessage(0xffff, 0x0112, 0xf170, 2) } } 'On' { if ($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 = $t::SendMessage(0xffff, 0x0112, 0xf170, -1) } } 'Brightness' { (Get-WmiObject -Namespace root/WMI -Class WmiMonitorBrightnessMethods).WmiSetBrightness(1,$Brightness) } } } end { Write-Verbose -Message "Ending [$($MyInvocation.Mycommand)]" } } |