Control.OnHelpRequested(HelpEventArgs) Method
Definition
Important
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Raises the HelpRequested event.
protected:
virtual void OnHelpRequested(System::Windows::Forms::HelpEventArgs ^ hevent);protected virtual void OnHelpRequested (System.Windows.Forms.HelpEventArgs hevent);abstract member OnHelpRequested : System.Windows.Forms.HelpEventArgs -> unit
override this.OnHelpRequested : System.Windows.Forms.HelpEventArgs -> unitProtected Overridable Sub OnHelpRequested (hevent As HelpEventArgs)Parameters
- hevent
- HelpEventArgs
A HelpEventArgs that contains the event data.
Remarks
Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.
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(HelpEventArgs) in a derived class, be sure to call the base class's OnHelpRequested(HelpEventArgs) method so that registered delegates receive the event.
