What's this Help?

How do I use the "Whats this Help" property of a Form?
Explain me with a clear example?

some programs (I think MS word does) have in the top right, a question mark button, next to the minimize, resize and close buttons of the program.
When you press this, then click the mouse over an object, a tooltip help file appears to tell you what the objects used for.

That's what it is. The following's from MS that should help get you started :

Code:

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Step-by-Step Example :
1) Create a new project in Visual Basic. Form1 is created by default.
2) Set the WhatsThisHelp and WhatsThisButton properties for
  Form1 to True.
3)Add the following code to reference the Hotspot Editor
  help file to the Form_Load procedure:

      Private Sub Form_Load()
      '  your machine
      '  Change this path to where ever Msdev.hlp is located on
        App.HelpFile = "C:\Program
        Files\DevStudio\Common\MSDev98\Help\Msdev.hlp"
 
4) Add two menu items to Form1 using the following as a guide:

      Menu                  Property            Value
      ----------------------------------------------------
      WhatsThis              Caption            WhatsThis
      WhatsThis              Name              mnuWhatsThis
      WhatsThis              Visible            False

      What's This?          Caption            What's This?
      What's This?          Name              mnuWhatsThisHelp
 
5) Indent "What's This?" to make it a sub-menu of WhatsThis
  by pressing the right-arrow button on the Menu Editor.
6) Add the following code to the General Declarations section of Form1:

  Public ThisControl as control

7) Add the following code to the mnuWhatsThisHelp_Click procedure:

  Private Sub mnuWhatsThisHelp_Click()
      ThisControl.ShowWhatsThis
  End Sub
 
8) Add a Command Button control to the form and set the following Properties:

  WhatsThisHelpID = 1
  HelpContextID = 5

9) Add following code to the Command1_MouseUp event:

  Private Sub Command1_MouseUp(Button As Integer, _
  Shift As Integer, X As Single, Y As Single)
      If Button = vbRightButton Then
          Set ThisControl = Command1
          PopupMenu mnuWhatsThis
      End If
      Set ThisControl = Nothing
  End Sub
 
10)Run the application. Right-click on the Command button and then
left- click on the "What's This?" popup to bring up the Help file.

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Thanks a lot Alex