Apparently this used to be a way in VB6 and VBA to short circuit and execute the first true case:
Select Case True
End Select
Is this still
Select Case is a powerful operator by itself. But even though Select Case True is still supported, it is better to be avoided for maintainability perspective. You always have to justify the need. If needed badly, you can even use DoEvents and GoTo. For the accepted answer, it could have been written like this instead:
Select Case testVariable
Case Is < 0 : Console.Write("You must supply a non-negative value.")
Case Is > 10 : Console.Write("Please enter a number from 0-10.")
Case Else : Call DoWork(testVariable)
End Select