getOpenWindows function

get_open_windows.rs

// Requires winapi-rs.
// Accidentally made this instead of a getOpenPrograms function so just putting it as a gist so it doesn't go to waste.

use winapi::{
    um::winuser::{EnumWindows, GetWindowTextW}
};

static mut windows: Vec<String> = Vec::new(); // Use a static because local variables aren't sent to non-closure functions.

unsafe fn getOpenWindows() -> bool {
    const MAXSIZE: usize = 100; // Maximum size of window title.
    windows = Vec::new();
    unsafe extern "system" fn windowCallback(wnd: HWND, lparam: isize) -> BOOL {
        let mut name_buf: [u16; MAXSIZE] = [0; MAXSIZE]; // Fetch the name from windows into a utf16 array
        GetWindowTextW(wnd, name_buf.as_mut_ptr(), MAXSIZE as i32);
        if let Ok(name) = String::from_utf16(&name_buf) {
            windows.push(name);
        }
        return 1;
    }
    EnumWindows(Some(windowCallback), 0)!=0
}

fn main() {
    unsafe{
        println!("Success. {}, ", getOpenWindows());
        println!("Windows: {:?}", windows);
    }
}

Don't think the return value is whether it errored in getting a window title, rather if you prematurely exit by returning 0 / C TRUE inside windowCallback.