Assembly: System.Windows.Forms (in system.windows.forms.dll)
A Control from which to retrieve the Help topic.
Return ValueThe Help keyword associated with this control, or a null reference (Nothing in Visual Basic) if the HelpProvider is currently configured to display the entire Help file or is configured to provide a Help string.
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.