rust在Windows操作系统下获取LCID

在Linux系统下我们可以通过std::env::var（“LANG”）来获取操作系统的语言信息。但是在Windows下std::env::var("LANG")是没有值 的。这个时候就需要用到winapi了。

cargo.toml:

[package]
name = "winapi_sample"
version = "0.1.0"
authors = ["许阳 "]
edition = "2018"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[target.'cfg(windows)'.dependencies]
winapi = { version = "0.3", features = ["winnls"] }

main.rs

#[cfg(windows)] 
extern crate winapi;

#[cfg(windows)]
fn test() {
    use winapi::um::winnls::GetUserDefaultLCID;
    unsafe{
        println!("{}", GetUserDefaultLCID());
    }
}

fn main() {
    test();
    println!("Hello, world!");
}