dll.rs

Cargo.toml

[target.'cfg(windows)'.dev-dependencies]
windows = { version = "0.48.0", features = [
    "Win32_System_LibraryLoader",
    "Win32_Foundation",
] }

gistfile1.txt

use std::{os::windows::ffi::OsStrExt, path::Path};

use cxx_api;

fn load_dll(dll_path: &str) {
    let path = std::ffi::OsStr::new(dll_path).encode_wide().chain(Some(0)).collect::<Vec<u16>>();
    let path = windows::core::PCWSTR(path.as_ptr() as *mut _);
    let result = unsafe { windows::Win32::System::LibraryLoader::SetDllDirectoryW(path) };
    println!("cargo:warning=load result {} {:?}", dll_path, result);
}

windows not working