Sub Test()
Dim powepointApp As Object
Dim powepointPres As Object
Set powepointApp = CreateObject("powerpoint.Application")
powepointApp.Visible = True
Set powepointPres = powepointApp.Presentations.Open("S" & RepGestion & "DIA\ProcédureDIA.pptx", ReadOnly:=True)
powepointPres.SlideShowSettings.Run
Set powepointPres = Nothing
Set powepointApp = Nothing
End Sub