use bevy::{prelude::*, window::CreateWindow}; fn main() { App::build() .add_default_plugins() .add_startup_system(setup.system()) .run(); } fn setup(mut create_window_events: ResMut>) { // sends out a "CreateWindow" event, which will be received by the windowing backend create_window_events.send(CreateWindow { descriptor: WindowDescriptor { width: 800, height: 600, vsync: false, title: "another window".to_string(), }, }); }