[SCRIPT] Set As Background Wallpaper (Stretched etc.)

[total_annihilation00]

Useful "Set As Wallpaper (Stretched)" PowerShell Script for Custom Context Menu Integration. This script enhances the context menu to reliably set an image as wallpaper in "Stretched" mode, circumventing limitations in MC (MultiCommander) where the "Set As Background Image" option is unavailable—particularly in Flat View. By adding this as a custom context menu item (configured via Config > "Custom Context Menu"), users can consistently apply wallpapers regardless of MC's view mode.

Implementation Details:
Update the $ScriptFilePath variable in the script with your local path (ensure directory separators are escaped with double backslashes \\).
Supports multiple display modes; create five different scripts /w provided values (see below), e.g.:

• SetWallpaperMCStretched.ps1
• SetWallpaperMCFill.ps1
• SetWallpaperMCFit.ps1
• SetWallpaperMCCenter.ps1
• SetWallpaperMCTile.ps1

Notes:
Tested on MC 15.8 running on Windows 10.
To add to the context menu: navigate to Config > "Custom Context Menu" and add the script.

claude-opus-4-5-20251101-thinking-32k AI Generated::
## Step 1: Fixed PowerShell Script

Save this as `C:\SetWallpaper.ps1`:

```powershell

Code: [Select]

param([string]$ImagePath)

# Load WinForms so MessageBox works
# Add-Type -AssemblyName System.Windows.Forms

# Debug: Show what path was received (remove this line after testing)
# [System.Windows.Forms.MessageBox]::Show($ImagePath)

Set-ItemProperty -Path 'HKCU:\Control Panel\Desktop' -Name WallpaperStyle -Value '2'
Set-ItemProperty -Path 'HKCU:\Control Panel\Desktop' -Name TileWallpaper -Value '0'

$code = @"
using System;
using System.Runtime.InteropServices;
public class Wallpaper {
    [DllImport("user32.dll", CharSet = CharSet.Auto)]
    public static extern int SystemParametersInfo(int uAction, int uParam, string lpvParam, int fuWinIni);
}
"@

Add-Type -TypeDefinition $code -ErrorAction SilentlyContinue
[Wallpaper]::SystemParametersInfo(20, 0, $ImagePath, 3)
```
---

## Step 2: Corrected MC.Run Command

The issue is likely the variable not expanding properly. Try this (Save this as a User-Defined Command then add it to Config > Custom Context Menu to set the selected file as a Stretched Wallpaper):

```multiscript

Code: [Select]

@var $imgPath = GetSourceFocusPath();
@var $arguments = "-ExecutionPolicy Bypass -File \"C:\\SetWallpaper.ps1\" -ImagePath \"" + $imgPath + "\"";
MC.Run CMD="powershell.exe" ARG="{$arguments}";
```
---

Notes (if you want other styles later)
These registry values are the ones Windows uses:

• Stretch: WallpaperStyle=2, TileWallpaper=0 (used above)
• Fill: WallpaperStyle=10, TileWallpaper=0
• Fit: WallpaperStyle=6, TileWallpaper=0
• Center: WallpaperStyle=0, TileWallpaper=0
• Tile: WallpaperStyle=0, TileWallpaper=1

[total_annihilation00]

A significantly improved and optimized version of this script has been generated using an advanced Generative AI model, resulting in enhanced performance and efficiency. Please use the latest version provided here, while retaining the previous one for archival purposes.

claude-opus-4-6-thinking AI Generated:::
PowerShell Script (SetWallpaperMCStretch.ps1)

Code: [Select]

param([string]$ImagePath)

# Validate file exists
if (-not (Test-Path $ImagePath)) {
    Write-Error "File not found: $ImagePath"
    exit 1
}

# Set style: Stretch
Set-ItemProperty -Path 'HKCU:\Control Panel\Desktop' -Name WallpaperStyle -Value '2'
Set-ItemProperty -Path 'HKCU:\Control Panel\Desktop' -Name TileWallpaper -Value '0'

# Apply wallpaper via Win32 API
Add-Type -TypeDefinition @"
using System;
using System.Runtime.InteropServices;
public class Wallpaper {
    [DllImport("user32.dll", CharSet = CharSet.Auto)]
    public static extern int SystemParametersInfo(int uAction, int uParam, string lpvParam, int fuWinIni);
}
"@ -ErrorAction SilentlyContinue

# SPI_SETDESKWALLPAPER = 0x0014 (20)
# SPIF_UPDATEINIFILE | SPIF_SENDCHANGE = 3
[Wallpaper]::SystemParametersInfo(20, 0, $ImagePath, 3)

<#
Style Reference:
  Stretch : WallpaperStyle=2,  TileWallpaper=0
  Fill    : WallpaperStyle=10, TileWallpaper=0
  Fit     : WallpaperStyle=6,  TileWallpaper=0
  Center  : WallpaperStyle=0,  TileWallpaper=0
  Tile    : WallpaperStyle=0,  TileWallpaper=1
  Span    : WallpaperStyle=22, TileWallpaper=0
#>

MultiScript (Custom Command)

Code: [Select]

@var $imgPath = GetSourceFocusPath();
@var $scriptPath = "C:\\Path\\To\\SetWallpaperMCStretch.ps1";
@var $arguments = "-ExecutionPolicy Bypass -WindowStyle Hidden -File \"" + $scriptPath + "\" -ImagePath \"" + $imgPath + "\"";
MC.Run CMD="powershell.exe" ARG="{$arguments}" FLAGS="NOWAIT|NOCONSOLE";

Notes (if you want other styles later)
These registry values are the ones Windows uses:

• Stretch: WallpaperStyle=2, TileWallpaper=0 (used above)
• Fill: WallpaperStyle=10, TileWallpaper=0
• Fit: WallpaperStyle=6, TileWallpaper=0
• Center: WallpaperStyle=0, TileWallpaper=0
• Tile: WallpaperStyle=0, TileWallpaper=1

These are just quality-of-life tweaks. The core SystemParametersInfo approach remains the right one.