Weblets are the basic unit of functionality in earlier releases of Enterprise Portal. They are X++ code that produces HTML to be displayed in Enterprise Portal pages. Weblets form the basis of several Web parts that can be used on Web part pages.
While weblets and the Web parts based on them can still be used in Enterprise Portal, any new functionality should be developed by using User Controls that are created by using Visual Studio. For more information, see User Controls Overview.
Several standard weblets are included with Enterprise Portal. You can use a Generic Web Part to add these weblets to an Enterprise Portal page. You can also create new weblets.