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ShowWhatsThis Method (ActiveX Controls)

Visual Studio .NET 2003

Displays a selected topic in a Help file using the What's This popup provided by Help in 32-bit Windows operating systems.



The object placeholder represents an object expression that evaluates to an object in the Applies To list.


The ShowWhatsThis method is very useful for providing context-sensitive Help from a context menu in your application. The method displays the topic identified by the WhatsThisHelpID property of the object specified in the syntax.


This example displays the What's This Help topic for a CommandButton control by selecting a menu command from a context menu created for the button. Set the WhatsThisHelp property of the form to True. Place a CommandButton control on a form, create a menu using the Menu Editor with a top-level invisible item named mnuBtnContextMenu, and a sub-menu named mnuBtnWhatsThis with a caption of "What's This?".

Private ThisControl As Control

Private Sub Command1_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
      If Button = vbRightButton Then
         Set ThisControl = Command1
         PopupMenu mnuBtnContextMenu
      End If
   Set ThisControl = Nothing
End Sub

Private Sub mnuBtnWhatsThis_Click()
End Sub

See Also

WhatsThisHelpID Property (ActiveX Controls)

Applies To: Masked Edit Control | MSChart Control

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