// In cargo.toml:
/*

[dependencies]
winapi = "0.2.8"
ole32-sys = "0.2.0"
shell32-sys = "0.1.1"
uuid-sys = "0.1.1"
widestring = "0.2.2"
*/

extern crate shell32;
extern crate winapi;
extern crate uuid;
extern crate widestring;
extern crate ole32;
use std::ptr;
use widestring::WideCString;

fn get_downloads_directory_windows() -> Option<String> {
    unsafe {
        let mut pname : winapi::LPWSTR = ptr::null_mut();
        let hresult = shell32::SHGetKnownFolderPath(&uuid::FOLDERID_Downloads, 0, ptr::null_mut(), &mut pname);
        if hresult == winapi::S_OK {
            let sys_downloads_cs = WideCString::from_ptr_str(pname);
            ole32::CoTaskMemFree(pname as winapi::LPVOID);
            Some(sys_downloads_cs.to_string_lossy())
        }
        else { None }
    }
}