pressing the Esc key when using dialog Confirm()

var way = confirm(" AAA ?");

if (ScriptUI.environment.keyboardState.keyName == "Escape") alert ("Escape");

else if (way) alert("Y")
else alert("N")

No. But you can write your own dialog box and handle button clicks the way you want.

var result = ['yes', 'esc', 'no']
alert (result[createDialog('test question?')-1])
function createDialog(text) {
    var w = new Window('dialog {text: "Test confirm window"}'),
        stInput = w.add('statictext', undefined, text),
        gBn = w.add('group {orientation: "row", alignChildren: ["left","center"]}'),
        bnOk = gBn.add('button', undefined, 'Yes', { name: 'bnOk' }),
        bnCancel = gBn.add('button', undefined, 'No', { name: 'bnCancel' });
    bnOk.active= true;
    bnOk.onClick = function () {  w.close(1)  }
    bnCancel.onClick = function () { w.close(3)  }
     return w.show();
}