.NET Windows Forms in a Nutshell

This class should be used as the base for classes that encapsulate the data for events that can be canceled .

It provides a Cancel property that can be set by the client of the event to indicate that the action that raised the event should be aborted.

public class CancelEventArgs : EventArgs { // Public Constructors public CancelEventArgs (); public CancelEventArgs (bool cancel ); // Public Instance Properties public bool Cancel {set; get; } }

Hierarchy

System.Object System.EventArgs CancelEventArgs

Subclasses

System.Drawing.Printing.PrintEventArgs , System.Windows.Forms.{InputLanguageChangingEventArgs , TreeViewCancelEventArgs}

Passed To

CancelEventHandler.{BeginInvoke() , Invoke()} , System.Windows.Forms.Control.OnValidating() , System.Windows.Forms.FileDialog.OnFileOk() , System.Windows.Forms.Form.OnClosing()