Form.OnClosed Method
Assembly: System.Windows.Forms (in system.windows.forms.dll)
Raising an event invokes the event handler through a delegate. For more information, see Raising an Event.
The OnClosed method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.
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 ref class myForm: public Form { protected: virtual void OnClosed( EventArgs^ e ) override { MessageBox::Show( "The form is now closing.", "Close Warning", MessageBoxButtons::OK, MessageBoxIcon::Warning ); Form::OnClosed( e ); } public: myForm() : Form() {} };
public class myForm extends Form
{
protected void OnClosed(EventArgs e)
{
MessageBox.Show("The form is now closing.", "Close Warning",
MessageBoxButtons.OK, MessageBoxIcon.Warning);
super.OnClosed(e);
} //OnClosed
public myForm()
{
super();
} //myForm
} //myForm
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.