This example uses the HelpContext property of the Err object to show the Visual Basic Help topic for the Overflow
error.
Dim Msg
Err.Clear
On Error Resume Next
Err.Raise 6 ' Generate "Overflow" error.
If Err.Number <> 0 Then
Msg = "Press F1 or HELP to see " & Err.HelpFile & " topic for" & _
" the following HelpContext: " & Err.HelpContext
MsgBox Msg, , "Error: " & Err.Description, Err.HelpFile, _
Err.HelpContext
End If