In the ThisWorkbook Code you can set the Event Handler workbook beforesave such as
Code:
Private Sub Workbook_BeforeSave(ByVal SaveAsUI As Boolean, Cancel As Boolean)
If Range("H65536").End(xlUp).Row = 1 Then
Cancel = True
End If
End Sub
this checks if there is anything in any cell in column H bar row 1.
the Cancel = True Cancels the Save Event.
To Get into ThisWorkbook code get into VBA Window (Press Alt+F11)
and Double click on thisworkbook under the Project Explorer.
Hope this Helps
David