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Control.OnHelpRequested Method

Raises the HelpRequested event.

[Visual Basic]
Protected Overridable Sub OnHelpRequested( _
   ByVal hevent As HelpEventArgs _
protected virtual void OnHelpRequested(
 HelpEventArgs hevent
protected: virtual void OnHelpRequested(
 HelpEventArgs* hevent
protected function OnHelpRequested(
   hevent : HelpEventArgs


A HelpEventArgs that contains the event data.


Raising an event invokes the event handler through a delegate. For more information, see Raising an Event.

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


Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also

Control Class | Control Members | System.Windows.Forms Namespace | HelpRequested

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