HelpButtonClicked Event

Form.HelpButtonClicked Event

Note: This event is new in the .NET Framework version 2.0.

Occurs when the Help button is clicked.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in

public event CancelEventHandler HelpButtonClicked
/** @event */
public void add_HelpButtonClicked (CancelEventHandler value)

/** @event */
public void remove_HelpButtonClicked (CancelEventHandler value)

JScript supports the use of events, but not the declaration of new ones.

The HelpButtonClicked event occurs when the Help button in the form's caption bar is clicked. The Help button is displayed when the HelpButton property is set to true. HelpButtonClicked can be canceled.

For more information about handling events, see Consuming Events.

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0

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