file.qml

import QtQuick 2.0
import QtQuick.Controls 1.3
import QtQuick.Dialogs 1.2

Rectangle {
    width: 800
    height: 600

    Button {
        id: btn
        x: 362
        y: 319
        text: qsTr("Freeze")
        onClicked: {
            loadDialog.visible = true
            ctrl.doFreeze()
        }
    }

    MessageDialog {
        objectName: "loadDialog"
        id: loadDialog
        title: "Title"
        text: "Test"
        standardButtons: StandardButton.Cancel
        onAccepted: {
            console.log("Test")
            Qt.quit()
        }
    }
}