Closing a from oracle developer

hi....

anybody knows how to close an oracle form using the WHEN BUTTON PRESSED trigger in oracle developer....

thanks...

An example of the query can be helpful

Also what do you want to use it for?

i want to usse button to close the currently opened form....

exapmle of query?????

I meant sql query or code if you like...

why do you need sql query....i dont underrstand....i just want to close a form with a button.....it needs query/?????