System.Windows.Forms 2.0.0.0 System.Enum The and events are raised when a is closed, either through user action or programmatically. Handlers for these events receive parameters of type and , respectively. Both of these event argument classes use the enumeration.

Specifies the reason that a form was closed.

Field System.Windows.Forms.CloseReason

The method of the class was invoked.

2.0.0.0 Field System.Windows.Forms.CloseReason

The owner form is closing.

2.0.0.0 Field System.Windows.Forms.CloseReason

The parent form of this multiple document interface (MDI) form is closing.

2.0.0.0 Field System.Windows.Forms.CloseReason

The cause of the closure was not defined or could not be determined.

2.0.0.0 Field System.Windows.Forms.CloseReason

The Microsoft Windows Task Manager is closing the application.

2.0.0.0 Field System.Windows.Forms.CloseReason

The user is closing the form through the user interface (UI), for example by clicking the Close button on the form window, selecting Close from the window's control menu, or pressing ALT+F4.

2.0.0.0 Field System.Windows.Forms.CloseReason

The operating system is closing all applications before shutting down.

2.0.0.0