How to programmatically trigger "Next desktop background" in Windows using C#?

Question

I'm developing a customized application for personal use on my system. It's a system controller that runs on startup and appears when I press the F1 and F2 keys simultaneously. I initially built it to trigger specific system functionality without needing to dive into the settings every time.

I’d like to add the ability to cycle through desktop backgrounds. Specifically, I want to mimic the functionality of the "Next desktop background" option in the Windows context menu:

Is there a way to programmatically access this setting in C#?

I already have experience with PInvoke and similar C++ functionality, but I’m still relatively new to this and might need guidance on implementing it properly. What can I try next?

Hey halfer, I saw your edits. I'm still a bit new to stack and I am curious as to why I should not end a question with a thank you for everyone? — CausticLasagne
– CausticLasagne, Commented Jan 5 at 1:34

Charlieface · Accepted Answer · 2025-01-05 02:27:36Z

0

You can use the IDesktopWallpaper.AdvanceSlideshow method, which is a COM interface from the shlobj header, and should be registered in CLSID on your system.

Install CsWin32 NuGet package. Alternatively write up the whole interface manually.

[ComImport]
[Guid("C2CF3110-460E-4FC1-B9D0-8A1C0C9CC4BD")]
public class DesktopWallpaper;

var wallpaper = new DesktopWallpaper();
wallpaper.AdvanceSlideshow(null, 0);

answered Jan 5 at 2:27

Charlieface

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3 Comments

CausticLasagne Feb 4 at 4:43

This sounds good but I think its time for me to move on from C# and into C++. I've wanted to for a long time just been scared of the complexity. No more! I want system customisation!

Charlieface Feb 4 at 10:52

I suggest you consider Rust....

CausticLasagne Feb 17 at 15:47

Rust... I've heard about that. I'm not going to look into it right now until everyone starts touting it as the next language. I am sure it will be soon and I'm keeping my eyes peeled. Looks exciting and powerful.

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