Updated: July 2010
Specifies the reason that a form was closed.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
|The cause of the closure was not defined or could not be determined.|
|The operating system is closing all applications before shutting down.|
|The parent form of this multiple document interface (MDI) form is closing.|
|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.|
|The form is closing because the user clicked End Task in Microsoft Windows Task Manager. Note that if the user ends a process by clicking End Process, the form closes without raising the FormClosing or FormClosed event.|
|The owner form is closing.|
|The Exit method of the Application class was invoked.|
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.