https://github.com/rgl/setwindowsdesktopwallpaper
set the current display wallpaper (and update it when the display is resized)
https://github.com/rgl/setwindowsdesktopwallpaper
wallpaper wallpaper-changer windows
Last synced: 2 months ago
JSON representation
set the current display wallpaper (and update it when the display is resized)
- Host: GitHub
- URL: https://github.com/rgl/setwindowsdesktopwallpaper
- Owner: rgl
- Created: 2022-01-02T18:48:12.000Z (almost 4 years ago)
- Default Branch: main
- Last Pushed: 2022-02-05T11:29:59.000Z (over 3 years ago)
- Last Synced: 2024-12-31T11:06:13.198Z (9 months ago)
- Topics: wallpaper, wallpaper-changer, windows
- Language: PowerShell
- Homepage:
- Size: 7.81 KB
- Stars: 1
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# About
[](https://github.com/rgl/SetWindowsDesktopWallpaper/actions?query=workflow%3ABuild)
This set the current display wallpaper (and update it when the display is resized).
# Usage
Install the .NET 6.0 SDK.
Execute the `Debug` version:
```pwsh
cd SetWindowsDesktopWallpaper
dotnet run
```
Execute the `Release` version:
```pwsh
dotnet publish --runtime win-x64 --self-contained --configuration Release
.\bin\Release\net6.0-windows10.0.17763\win-x64\publish\SetWindowsDesktopWallpaper.exe
```
You can also use vagrant to try this in a multiple display environment.
# COM Interop
This uses [IDesktopWallpaper.SetWallpaper](https://docs.microsoft.com/en-us/windows/win32/api/shobjidl_core/nf-shobjidl_core-idesktopwallpaper-setwallpaper) COM method to set a display wallpaper.
This uses the [Microsoft.Windows.CsWin32](https://github.com/microsoft/CsWin32) source code generator to automatically generate the required COM Interop code to call `IDesktopWallpaper.SetWallpaper`.
## Manual COM Interop
Instead of using the code generator, we could manually create the interop code with this powershell script:
```powershell
$vsInstallPath = 'C:\VisualStudio2019Community'
Import - Module $vsInstallPath\Common7\Tools\Microsoft.VisualStudio.DevShell.dll
Enter-VsDevShell -VsInstallPath $vsInstallPath
# convert the COM interfaces to a dotnet assembly.
# e.g. C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\um\ShObjIdl_core.idl
$idlPath = $env:INCLUDE - split ';' | ForEach - Object { "$_\ShObjIdl_core.idl" } | Where - Object { Test - Path $_ }
midl.exe / target NT62 /out $PWD / tlb ShObjCore.tlb / x64 $idlPath
tlbimp.exe ShObjCore.tlb /out:ShObjCore.dll /namespace:ShObjCore /machine:X64
```
Then use ILSpy to manually extract the relevant code (ShObjCore.IDesktopWallpaper interface et all).
Then convert all out parameters to return values.
Or better, use the [Vanara.Windows.Shell.WallpaperManager](https://github.com/dahall/Vanara/blob/v3.3.15/Windows.Shell/WallpaperManager.cs) wrapper.
# Reference
* [Microsoft.Windows.CsWin32 Code Generator](https://github.com/microsoft/CsWin32).
* this generates the code from the common [win32metadata](https://github.com/microsoft/win32metadata).
* [Vanara Library](https://github.com/dahall/Vanara).
* [SkiaSharp Library](https://github.com/mono/SkiaSharp).
* [Docs: COM Interop in .NET](https://docs.microsoft.com/en-us/dotnet/standard/native-interop/cominterop).