How to change lockscreen wallpaper by using Windows SDK (C++) or modifying registry?

Question

Hi all.

My Windows version is Windows 10 22H2 19045.2846, and I'd like to change my lockscreen wallpaper by using Windows SDK (or dll function), but I can't find any function for it.

I want to get a function, which is equal to [Setting]-[Personalize]-[Lockscreen Interface]-[Select picture] operation.

How can I implement this functionality (not using UWP/C# but C++ or C)?

Answer 1

Hello,

Welcome to Microsoft Q&A!

According to your description (Windows SDK) and the tag (Windows App SDK), whether you want to use winui3 project (Windows App SDK) or desktop project (Windows SDK)?

For desktop project:

According to the Doc: Personalization CSP

I suggest you could try to change the registry by creating a new key in the

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\PersonalizationCSP

For more details, you could refer to the threads:

https://social.technet.microsoft.com/Forums/windows/zh-CN/8e02368a-3ce9-4e08-b596-7e10483a6679/3245231574300532716926495?forum=WinServerPreviewZHCN

https://stackoverflow.com/a/51785913

For winui3 project:

You could follow Castorix31's suggestion. And you could refer to the sample: Lock screen personalization sample

Thank you.

Jeanine

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Answer 2

With LockScreen.SetImageFileAsync(IStorageFile)