Occurs when the user requests help for a control.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The event is commonly raised when the user presses the F1 key or an associated context-sensitive help button is clicked.
For more information about handling events, see Handling and Raising Events.
The following code example demonstrates handling the event to display custom Help content on a form containing four address fields. The event is raised either by pressing the F1 key with the focus in an address field, or by the using the context-sensitive Help button and clicking the Help cursor on an address field. The Handled property is set to true to indicate that the HelpRequested event is handled. The example also demonstrates storing the Help text in the Control.Tag property.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.