I turned off auto data tip and, indeed, it stopped displaying the msgbox. In other words, nothing happened. Very good! Learnt something today. Thanks.Yes. If you turn off the 'Auto data tips' setting, you shouldn't see the behaviour anymore.
Public Property Get IfTooManyGoes() As Boolean
If LetterGuessed = "" Then StartGuess
IfTooManyGoes = (LetterGuessed <> "")
End Property