win-screenshot

Take a screenshot from specified window or whole display on windows platform

Example ``` fn main() { // capture whole display capture_display().unwrap().save("screenshot.jpg").unwrap();

// capture window by known id
capture_window(67136).unwrap().save("screenshot.jpg").unwrap();

// capture window by Name
let window_name = "WindowName";

match find_window(window_name) {
    Ok(hwnd) => capture_window(hwnd)
        .unwrap().save("screenshot.jpg").unwrap(),
    Err(_) => panic!("window {} not found!", window_name)
}

} ```