Question : how to know and see all of predefined functions in TOAD editor for oracle?

I have installed TOAD editor for oracle 8i.
my requirement is when I write programming, I should show all of predefined functions and prototypes of oracle.
 what should bring my aim ?
how to know and see all of predefined functions in TOAD editor?

Answer : how to know and see all of predefined functions in TOAD editor for oracle?

I needed to have Integrated Security = True in my DB connection in the web.config file, it worked then.