Display alerts are not enabling in excel file from access vba - ms-access

Question

I'm writing contents of tables from access to excel(Opening the excel file from access) After writing it i'm trying to save all workbooks in the appXL application. For that i'm making DispalyAlerts false before saving and trun on back after saving. After writing contents to excel i'm closing the access. After writing ,when i'm trying to close the excel, it is not giving any alerts like Do you want to save the contents?
My vba code
Sub Writexl()
Dim appXL As Excel.Application
Dim wb As Excel.Workbook
StrwbPath="C:\temp\sample.xls"
Set appXL = CreateObject("Excel.Application")
With appXL
Set wb = .Workbooks.Open(StrwbPath)
.Visible = True
End With
'here code for writing contents
'save workbook after writing
appXL.Application.DisplayAlerts = False
For Each w In appXL.Application.Workbooks
w.Save
Next w
appXL.Application.DisplayAlerts = True
DoCmd.Quit acQuitSaveAll
Application.Quit
End sub

Answer 1

You are setting the DisplayAlerts to the Application's Applicaiton
appXL.Application.DisplayAlerts = True
is conceptually equivalent to
Excel.Application.Application.DisplayAlerts = True
So the property is being set on the parent application to Excel.
Try
appXL.DisplayAlerts = True

Answer 2

After writing ,when i'm trying to close the excel, it is not giving
any alerts like Do you want to save the contents?
As #David Zemens says, why would it display a message to save all changes when you've already saved everything. Have you tried changing a cell and then exiting Excel?