What are the SAP api calls...

Hi, I have a question about the SAP Portal framework. For example, if I created an edit page for editing portlets, is there an api call that I make to tell SAP portal that I am on edit mode so that portal will subsequently save the changes to perhaps an xml file? Maybe there is a edit_mode variable ?

Any suggestions or sample code is greatly appreciated!

Thanks so much!

Baggett.