Public Sub images()
Dim nom As String
MsgBox "vous allez choisir le dossier où enregistrer les fichiers"
Application.FileDialog(msoFileDialogFolderPicker).Show
dossier = Application.FileDialog(msoFileDialogFolderPicker).InitialFileName
nom = dossier & ActivePresentation.Name
ActivePresentation.SaveAs FileName:=nom, FileFormat:=ppSaveAsJPG
End Sub