I'm trying to update window background using powershell. It works well when I execute it manually.
However for some needs, I want to run it by window scheduler or other automation program. And it doesn't work...
[Params]::SystemParametersInfo($SPI_SETDESKWALLPAPER, 0, $Image, $fWinIni) returns 0. Does anyone know why it doesn't work automatically? (I set the highest authority for scheduler.)
Function Set-WallPaper {
<#
.SYNOPSIS
Applies a specified wallpaper to the current user's desktop
.PARAMETER Image
Provide the exact path to the image
.PARAMETER Style
Provide wallpaper style (Example: Fill, Fit, Stretch, Tile, Center, or Span)
.EXAMPLE
Set-WallPaper -Image "C:\Wallpaper\Default.jpg"
Set-WallPaper -Image "C:\Wallpaper\Background.jpg" -Style Fit
#>
param (
[parameter(Mandatory = $True)]
# Provide path to image
[string]$Image,
# Provide wallpaper style that you would like applied
[parameter(Mandatory = $False)]
[ValidateSet('Fill', 'Fit', 'Stretch', 'Tile', 'Center', 'Span')]
[string]$Style
)
$WallpaperStyle = Switch ($Style) {
"Fill" { "10" }
"Fit" { "6" }
"Stretch" { "2" }
"Tile" { "0" }
"Center" { "0" }
"Span" { "22" }
}
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);
}
"@
$SPI_SETDESKWALLPAPER = 0x0014
$UpdateIniFile = 0x01
$SendChangeEvent = 0x02
$fWinIni = $UpdateIniFile -bor $SendChangeEvent
$ret = [Params]::SystemParametersInfo($SPI_SETDESKWALLPAPER, 0, $Image, $fWinIni)
}
Set-WallPaper -Image "D:\export\myname\aaa.png" -Style Fit
Tried it using ps1, bat. Neither worked.