Does anyone have an explanation for the following:

1) Put this code in the ThisWorkbook module of a new blank Excel Workbook.

Private Sub Workbook_BeforeClose(Cancel As Boolean)
ThisWorkbook.Worksheets("Sheet2").Activate
End Sub


2) Save the workbook as Test1.xls
3) Close Excel.
4) Make a copy of Test1.xls and name it Test2.xls.
5) Open both Test1.xls and Test2.xls.
6) Click the Close ("X") button for Excel (the upper right hand corner of
the Excel window).


You will notice that neither workbook closes. What is that all about.