Using the Split function with another function incorporated is not working correctly

Dear all, I've found and amended a small procedure called "SplitDemo" to search a string held in a cell to find a 3 digit code in that string - which works. I've tried improving it using a function called "ISLIKE" from a John Walkenback book (Excel 2010 Formulas p687) but it doesn't work. The line that seems to be causing the problem is below in the code 6 lines from the bottom. Can anyone help? I've attached a sample file, thanks, Neil

Public Function islike(text As String, pattern As String) As Boolean
'returns true if the first argument is like the second
islike = text Like pattern
End Function


Public Sub SplitDemo2()

    Dim txt As String
    Dim x As Variant
    Dim i As Long
    Dim t As Boolean
    
    txt = ActiveCell.Value
    x = Split(txt, " ")
    
    For i = 0 To UBound(x)
       Debug.Print x(i)
       If Len(x(i)) = 3 Then
            If t = islike("'" & x(i) & "'", "###") Then 'Get a Byref argument type mismatch error here!
                MsgBox x(i) & " is a match"
            End If
       End If
    Next i
End Sub