Me respondo sólo!!!! encontre la solucion y por ahi le sireve a alguien:
Private Sub Command1_Click()
Dim mat() As String
Dim t
t = "1,2,3,4,5,6,7,8,9,11,13,14,15,16,55"
mat() = Split(t, ",")
If HayDuplicados(mat()) Then MsgBox "Hay Dubplicados"
End Sub
Private Function HayDuplicados(sElementos() As String) As Boolean
Dim TempArray() As String
Dim x As Integer, x2 As Integer, y As Integer
Dim z As Integer, Elemento As Variant
Dim ArrFinal() As Variant
Dim nRedim As Long
Dim i As Integer
For i = LBound(sElementos) To UBound(sElementos)
ReDim Preserve TempArray(i)
TempArray(i) = sElementos(i)
Next
For x = 0 To UBound(sElementos)
z = 0
For y = 0 To UBound(sElementos)
If sElementos(x) = TempArray(z) And y <> x Then
sElementos(y) = ""
nRedim = nRedim + 1
HayDuplicados = True
Exit Function
End If
z = z + 1
Next y
Next x
End Function