代码:
#[cfg(windows)] extern crate winapi; use std::io::Error; #[cfg(windows)] fn print_message(msg: &str) -> Result<i32, Error> { use std::ffi::OsStr; use std::iter::once; use std::os::windows::ffi::OsStrExt; use std::ptr::null_mut; use winapi::um::winuser::{MB_OK, MessageBoxW}; let wide: Vec<u16> = OsStr::new(msg).encode_wide().chain(once(0)).collect(); let ret = unsafe { MessageBoxW(null_mut(), wide.as_ptr(), wide.as_ptr(), MB_OK) }; if ret == 0 { Err(Error::last_os_error()) } else { Ok(ret) } } #[cfg(not(windows))] fn print_message(msg: &str) -> Result<(), Error> { println!("{}", msg); Ok(()) } fn main() { print_message("Hello, world!你好!").unwrap(); }
cargo.toml
[target.'cfg(windows)'.dependencies]
winapi = { version = "0.3", features = ["winuser"] }
参考:https://github.com/retep998/winapi-rs