Trouble opening embedded Excel in PPT

[JS]

(I wrongly posted this in an incorrect forum)
Hi All,
I need to programmatically manipulate embedded excel objects in PPT.
I've put a macro together, but I am not able to get the macro to open the
embedded excel object (excel comes up blank). Can someone please tell me
what's wrong?
Thanks in advance, JS
=======================================
Sub a_Open_EmbeddedExcel()
Dim Shp As Shape
Dim Sld As Slide
Dim xlApp As Excel.Application
Dim oWorkbook As Excel.Workbook
Dim oWorksheet As Excel.Worksheet
Set xlApp = New Excel.Application
For Each Sld In Application.ActivePresentation.Slides
For Each Shp In Sld.Shapes
If Shp.Type = msoEmbeddedOLEObject Then
If Shp.OLEFormat.ProgID = "Excel.Sheet.8" Then
Set oWorkbook = Shp.OLEFormat.Object
Set oWorksheet = oWorkbook.ActiveSheet
With xlApp
.Visible = True
oWorksheet.Activate
MsgBox "Did it open the embedded excel object?"
MsgBox "There are " & xlApp.Windows(1).VisibleRange.Cells.Count & "
cells visible"
' if yes,
' MsgBox xlApp.ActiveWindow.VisibleRange.Address
' more excel macro commands here
End With
oWorkbook.Close (True)
Set oWorkbook = Nothing
Set oWorksheet = Nothing
End If 'Shp.Type
End If 'Shp.OLEFormat.ProgID
Next Shp
Next Sld
xlApp.Quit
End Sub