77
It's worth noting that even when On Error Resume Next is in effect, the Err object is still populated when an error occurs, so you can still do C-style error handling.
On Error Resume Next
DangerousOperationThatCouldCauseErrors
If Err Then
WScript.StdErr.WriteLine "error " & Err.Number
WScript.Quit 1
End If
On Error GoTo 0