But if you want to change the default form for only a specific folder but you cannot do it, there is a work around that allows you to indirectly set any type of form as the default form for a folder. However, in the case of your Inbox, items that arrive always have their typical message class and you cannot change this dynamically. There are a variety of reasons why custom icons may not seem to work correctly. The Slipstick Systems Web site provides a comprehensive summary of add-ins and utilities. As a developer, you should fully understand the implications of the Outlook E-mail Security Update.
Outlook provides many ways to programmatically access and manipulate items and folders.
Outlook does not support a full object model, such as those in Word or Microsoft Excel, so what you are trying to do may not be possible. Also, there may be other Outlook design considerations or limitations that may prevent you from using the approach that you want to create a solution. You can also use the Restrict method to retrieve a set of items that match certain criteria. There are three common scenarios that Outlook developers have problems with when they work with collections in the Outlook object model. Because collections, especially the Items collection, are in integral part of the Outlook object model, you should be familiar with these issues.