' Return True is a string is made only of spaces, tabs, and Null characters.' This function is especially useful to test whether fixed-length strings ' are initialized.Function IsNullString(Text As String) As Boolean Dim i As Long For i = 1 To Len(Text) Select Case Asc(Mid$(Text, i, 1)) Case 0, 9, 32 Case Else Exit Function End Select Next IsNullString = TrueEnd Function