Flatten create structure

Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>

advotracker_client/examples/windows_test.rs

@@ -0,0 +1,27 @@
+#[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!").unwrap();
+}