GUI_APP_MAIN
{
	Progress pg;
	pg.Title("A parallel processing job");
	pg.SetText("Working on many items at once...");
	pg.Set(0, 100);
	
	std::atomic<int> ii(0);
	CoDo([&] {
		for(int i = ii++; i < 100 ; i = ii++) {
			Sleep(1000); // Doing something...
			
			// OK, now it is done, update progress:
			
			if(IsMainThread())
				pg.SetPos(ii);
		}
	});
}