The PropertyPages collection object contains the custom property pages that have been added to the Microsoft Outlook Options dialog box or to the folder Properties dialog box.
Using the PropertyPages Collection Object
You receive a PropertyPages collection object as a parameter of the OptionsPagesAdd event. Use the Add method to add a PropertyPage object to the collection.
Note If more than one program handles the OptionsPagesAdd event, the order in which the programs receive the event (and therefore, the order in which pages are added to the PropertyPages collection) cannot be guaranteed.