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

Jiakang Li 20 Reputation points
2023-05-09T04:03:47.9333333+00:00

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)?

Windows 10
Windows 10
A Microsoft operating system that runs on personal computers and tablets.
10,697 questions
Windows API - Win32
Windows API - Win32
A core set of Windows application programming interfaces (APIs) for desktop and server applications. Previously known as Win32 API.
2,429 questions
C++
C++
A high-level, general-purpose programming language, created as an extension of the C programming language, that has object-oriented, generic, and functional features in addition to facilities for low-level memory manipulation.
3,544 questions
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Accepted answer
  1. Jeanine Zhang-MSFT 9,181 Reputation points Microsoft Vendor
    2023-05-09T07:05:48.65+00:00

    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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    1 person found this answer helpful.

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  1. Castorix31 81,831 Reputation points
    2023-05-09T06:01:23.0933333+00:00
    1 person found this answer helpful.
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