PowerShell/Scripts/set-wallpaper.ps1

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<#
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.SYNTAX set-wallpaper.ps1 [<image-file>] [<style>]
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.DESCRIPTION sets the given image file as wallpaper
(style is either Fill, Fit, Stretch, Tile, Center, or Span)
.LINK https://github.com/fleschutz/PowerShell
.NOTES Author: Markus Fleschutz / License: CC0
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#>
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param($ImageFile = "", $Style = "Fit")
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function SetWallPaper {
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param([string]$Image, [ValidateSet('Fill', 'Fit', 'Stretch', 'Tile', 'Center', 'Span')][string]$Style)
$WallpaperStyle = switch($Style) {
"Fill" {"10"}
"Fit" {"6"}
"Stretch" {"2"}
"Tile" {"0"}
"Center" {"0"}
"Span" {"22"}
}
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if ($Style -eq "Tile") {
New-ItemProperty -Path "HKCU:\Control Panel\Desktop" -Name WallpaperStyle -PropertyType String -Value $WallpaperStyle -Force
New-ItemProperty -Path "HKCU:\Control Panel\Desktop" -Name TileWallpaper -PropertyType String -Value 1 -Force
} else {
New-ItemProperty -Path "HKCU:\Control Panel\Desktop" -Name WallpaperStyle -PropertyType String -Value $WallpaperStyle -Force
New-ItemProperty -Path "HKCU:\Control Panel\Desktop" -Name TileWallpaper -PropertyType String -Value 0 -Force
}
Add-Type -TypeDefinition @"
using System;
using System.Runtime.InteropServices;
public class Params
{
[DllImport("User32.dll",CharSet=CharSet.Unicode)]
public static extern int SystemParametersInfo (Int32 uAction,
Int32 uParam,
String lpvParam,
Int32 fuWinIni);
}
"@
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$SPI_SETDESKWALLPAPER = 0x0014
$UpdateIniFile = 0x01
$SendChangeEvent = 0x02
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$fWinIni = $UpdateIniFile -bor $SendChangeEvent
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$ret = [Params]::SystemParametersInfo($SPI_SETDESKWALLPAPER, 0, $Image, $fWinIni)
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}
try {
if ($ImageFile -eq "" ) {
$ImageFile = read-host "Enter path to image file"
}
SetWallPaper -Image $ImageFile -Style $Style
exit 0
} catch {
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write-error "ERROR: line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
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exit 1
}