//slide change function void Application_SlideSelectionChanged(PowerPoint.SlideRange SldRange) { try { if (SldRange.Equals(null)) { if(currentlyViewed=="add"){ try { addDictionaries.showSlideNumber(SldRange.SlideID.ToString(), SldRange.SlideNumber.ToString()); } catch (System.AccessViolationException ex) { } } else if (currentlyViewed=="update") { updateDictionaries.showSlideNumber(SldRange.SlideID.ToString(), SldRange.SlideNumber.ToString()); } } } catch (AccessViolationException avEx) { } catch (Exception ex) { } }