طيب استبدل بهذا ......
Public Function CountNumberic() As Integer
Dim StringToSearch As String, ms As Integer, ms1 As Integer
Dim i As Integer
If Len(Me.Text4) <= 1 Or IsNull(Me.Text4) Then
StringToSearch = Me.Text1
Else
StringToSearch = Me.Text4
End If
ms = 0
ms1 = 0
For i = 1 To Len(StringToSearch)
ms = Mid(StringToSearch, i, 1)
ms1 = ms1 + ms
Next i
Me.Text4 = ms1
End Function