About this, it's the hard part of VB
In fact, it use the type of the container variable to switch between logical and bitwise:
code:

Sub test()
  Dim btest As Boolean
  Dim ntest As Long
  btest = Not 170
  ntest = Not 170
  MsgBox "btest : " & btest & Chr(10) & "ntest : " & ntest
End Sub

You'll get this :

code:

btest : True
ntest : -171

VB don't know screen output, that's why the msgbox is here
(well, until you add a complete module of API command to support dos box output)

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