Flash mx tools

It seems to be so simple but this thing has been bugging me for some time. How would you expand the outline of a shape evenly say by 10 px? In photoshop you can give the shape a stroke. What is the easiest way to do it in mx? Any help is appreciated.

hamid, you can also asign it with a stroke using the ink bottle but you first have to change your line to a fill by going in to modify shape convert lines to fill than you just use the ink bottle and clip where you want your new line

Thank you GUPPS for your reply. I had tried it many times before without a satisfying result. Let me explain a bit. with the same file after the lines are converted to fill, try this: Modify, Shape, Expand fill and give it a Distance of 5 and check the Inset. The whole thing gets filled why?