Form.OnClosed Method (EventArgs)


Raises the Closed event.

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

Protected Overridable Sub OnClosed (
	e As EventArgs


Type: System.EventArgs

The EventArgs that contains the event data.


The OnClosed method is obsolete in the .NET Framework version 2.0; use the OnFormClosed method instead.

Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.

The OnFormClosed method also allows derived classes to handle the event without attaching a delegate. Overriding this method is the preferred technique for handling the event in a derived class.


The OnClosed and OnClosing methods are not called when the Application.Exit method is called to exit your application. If you have validation code in either of these methods that must be executed, you should call the Form.Close method for each open form individually before calling the Exit method.

Notes to Implementers:

When overriding OnClosed in a derived class, be sure to call the base class's OnClosed method so that registered delegates receive the event.

The following code example demonstrates how to override the OnClosed method in a class derived from Form .

Public Class myForm
    Inherits Form

    Protected Overrides Sub OnClosed(ByVal e As EventArgs)
        MessageBox.Show("The form is now closing.", "Close Warning", _
            MessageBoxButtons.OK, MessageBoxIcon.Warning)
    End Sub

    Public Sub New()
    End Sub

End Class

.NET Framework
Available since 1.1
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