use case diagram for desktop application

hi,,
i am making use case diagram for a website builder, it is a desktop application in which components like textbox,button and other html components will be provided to the user so that he can make a static website without doing any coding part. the problem is that i am not properly getting the cases for the use case diagrams and hence asking you people to help me out,,,,just suggest me some cases and functionalities for any desktop application to make a use case diagram.....

ex. for any html editor or like netbeans(on a small level) etc.. what will be the cases for such tools??