Form.OnHelpButtonClicked(CancelEventArgs) Method

Reference

Definition

Namespace:: System.Windows.Forms

Assembly:: System.Windows.Forms.dll

Source:: Form.cs

Source:: Form.cs

Source:: Form.cs

Important

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Raises the HelpButtonClicked event.

protected:
 virtual void OnHelpButtonClicked(System::ComponentModel::CancelEventArgs ^ e);

protected virtual void OnHelpButtonClicked (System.ComponentModel.CancelEventArgs e);

abstract member OnHelpButtonClicked : System.ComponentModel.CancelEventArgs -> unit
override this.OnHelpButtonClicked : System.ComponentModel.CancelEventArgs -> unit

Protected Overridable Sub OnHelpButtonClicked (e As CancelEventArgs)

Parameters

e: CancelEventArgs

A CancelEventArgs 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 OnHelpButtonClicked 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 OnHelpButtonClicked(CancelEventArgs) in a derived class, be sure to call the base class's OnHelpButtonClicked(CancelEventArgs) method so that registered delegates receive the event.

Applies to

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