Members of the Fitch & Mather book club wanted to write literary critiques and post them to a public folder where all employees with read permission on the folder (as assigned by the Exchange Server administrator) could read the critiques submitted by their peers.
The LitCrit critique is a specialized type of form. The way a message is displayed and functions is determined by its message class. The IPM.Post message class met the requirements of the book club's messaging task because you can use it to post information directly to public folders. For more information on message classes, locate the topic "Message Classes" in the Messaging API (MAPI) section of the Microsoft Platform SDK on the Microsoft Developer Network (MSDN™) CD-ROM.
The book club chose to create the literary critique from the Outlook Post template, which creates a form with a Post message class. The new LitCrit form therefore is derived from (is a subclass of) the Post message class. The LitCrit message class is IPM.Post.BasicLitCrit.