theme.ps1
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$path = "HKCU:\Software\Microsoft\Windows\CurrentVersion\Themes\Personalize" function Set-Theme { [CmdletBinding(SupportsShouldProcess)] param( [Parameter(Mandatory = $true)] [ValidateSet("light", "dark")] [string] $Theme, [Parameter(Mandatory = $false)] [switch] $RestartExplorer = $false ) switch ($Theme) { "light" { $lightTheme = 1 } "dark" { $lightTheme = 0 } default { throw "unexpected theme '$Theme'" } } if ($PSCmdlet.ShouldProcess("Windows theme", "Set value to '$Theme'")) { Set-ItemProperty -Path $path -Name "SystemUsesLightTheme" -Value $lightTheme Set-ItemProperty -Path $path -Name "AppsUseLightTheme" -Value $lightTheme if ($RestartExplorer) { Stop-Explorer } } <# .SYNOPSIS Sets the Windows theme to either light or dark. .DESCRIPTION Sets the Windows theme to either light or dark. .PARAMETER Theme The theme to set. Valid values are "light" or "dark". .PARAMETER RestartExplorer If specified, Explorer is restarted after setting the theme. .EXAMPLE Set-Theme -Theme dark .EXAMPLE Set-Theme -Theme dark -RestartExplorer .EXAMPLE Set-Theme -Theme light -RestartExplorer #> } function Switch-Theme { [CmdletBinding(SupportsShouldProcess)] param( [Parameter(Mandatory = $false)] [switch] $RestartExplorer = $false ) switch ($light = (Get-ItemPropertyValue $path "SystemUsesLightTheme")) { 0 { Set-Theme light -RestartExplorer:$RestartExplorer } 1 { Set-Theme dark -RestartExplorer:$RestartExplorer } default { throw "unexpected value in SystemUsesLightTheme '$light'" } } <# .SYNOPSIS Switches the Windows theme between light and dark. .DESCRIPTION Switches the Windows theme from light to dark or dark to light. .PARAMETER RestartExplorer If specified, Explorer is restarted after switching the theme. .ALIAS theme .EXAMPLE Switch-Theme .EXAMPLE Switch-Theme -RestartExplorer #> } New-Alias -Name theme -Value Switch-Theme |