You can associate one or more forms with a folder. Associated forms will appear in the Field Chooser dialog box, as well as other drop-down lists that allow you to select visible fields in the folder. Alternatively, you can limit items posted to the folder to only those forms that have been associated with the folder.
To set the default form for the public folder
Note If you limit the form types available to the folder by clicking the Only forms listed above, or Forms listed above and the standard forms, you will not be able to create items in this folder programmatically with CDO.