import fl.controls.*;
import fl.events.*;

var tela_cheia:Boolean = false;

var botao:Button = new Button();
botao.label = "Tela cheia";
botao.setSize(200, 25);
botao.move(10, 10);
botao.addEventListener(MouseEvent.CLICK, onClick);
addChild(botao);
 
function onClick(evt:MouseEvent):void {
	if(tela_cheia == false){
		stage.displayState =  StageDisplayState.FULL_SCREEN;
		botao.label = "Normal";
		tela_cheia = true;
	} else {
		stage.displayState = StageDisplayState.NORMAL;
		botao.label = "Tela cheia";
		tela_cheia = false;
	}
}