StartupEventHandler Delegate

Represents the method that will handle the Application.Startup event.

Namespace:  System.Windows
Assembly:  System.Windows (in System.Windows.dll)


Public Delegate Sub StartupEventHandler ( _
    sender As Object, _
    e As StartupEventArgs _
public delegate void StartupEventHandler(
    Object sender,
    StartupEventArgs e



The following code shows how to handle the Startup event.

Partial Public Class App
    Inherits Application

    public Sub New()
    End Sub

    Private Sub Application_Startup(ByVal o As Object, _
        ByVal e As StartupEventArgs) Handles Me.Startup

        ' Detect when the application starts up.

    End Sub

End Class
using System.Windows; // Application, StartupEventArgs

namespace SilverlightApplication
    public partial class App : Application
        public App()
            this.Startup += this.Application_Startup;

        private void Application_Startup(object sender, StartupEventArgs e)
            // Detect when the application starts up.

Version Information


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0


For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.