Private Sub CommandButton3_Click()
If Dir("C:\\Mes documents\" & ComboBox1.Value, vbDirectory) = "" Then
Application.Dialogs(xlDialogOpen).Show ComboBox1.Value
Else
MsgBox "Chemin introuvable pour " & ComboBox1.Value, vbCritical Or vbOKOnly, "Erreur"
End If
End Sub