change-wallpaper.rs

mod bindings {
    ::windows::include_bindings!();
}

use std::ffi::c_void;

use bindings::Windows::Win32::WindowsAndMessaging::{
    SystemParametersInfoW, SystemParametersInfo_fWinIni, SYSTEM_PARAMETERS_INFO_ACTION,
};

fn main() {
    let wallpaper_change_succeeded;
    let mut path = r#"C:\image.png"#.encode_utf16().collect::<Vec<_>>();

    path.push(0);

    unsafe {
        wallpaper_change_succeeded = SystemParametersInfoW(
            SYSTEM_PARAMETERS_INFO_ACTION::SPI_SETDESKWALLPAPER,
            0,
            path.as_mut_ptr() as *mut c_void,
            SystemParametersInfo_fWinIni::SPIF_UPDATEINIFILE,
        );
    }

    if !wallpaper_change_succeeded.as_bool() {
        eprintln!("Failed to change the wallpaper");
    } else {
        println!("Wallpaper changed!");
    }
}