using System; using System.Collections.Generic; using System.Configuration; using System.Data; using System.Linq; using System.Windows; namespace WpfAppType3 { /// /// Interaction logic for App.xaml /// public partial class App : Application { bool isApplicationActive; void App_Activated(object sender, EventArgs e) { // Application activated this.isApplicationActive = true; } void App_Deactivated(object sender, EventArgs e) { // Application deactivated this.isApplicationActive = false; } } }