How do u make the paint brush tool on adobe fireworks straighten and smooth like on adobe flash?

On flash, when draw a line with the paint brush, it guesses what you want to do and fixes itself. ex: if you draw a square that isnt quite square but close enough, it will make it a propper square automatically. Is it possible to make it do this on fireworks?How do u make the paint brush tool on adobe fireworks straighten and smooth like on adobe flash?
You cant do that on adobe fireworks :/





You could use the line tool and create a path, but there is no auto straighten function.