Swap MovieClip - Paint/a bit of Games

How do you swap a movie clip at the click of a button? I ave been asking this for ages and nobody ever told me how to do it by actionscript. So that if I have a paint job and i want 2 different brushes how do I change the cursor to brush1 when enterframe; and change the cursor to brush2 on a button touch; and change back again??? (P.S. I would also like to know how to change the different patterns - so - i could draw in PEN when my cursor looks like a PEN and i could draw in PENCIL when my cursor looked like a PENCIL? [("a tutorial will do")] :)

Thanks And Merry Christmas!

Basically you need to provied a MovieClip in the Library wich are "Exported for ActionScript" (rightClick -> Linkage, in the Library)

As code says more than english and it is almost chrismas,
i did a little example:

you can also swapDepths with movieClips created at author time ie drawn directly on the stage and not called from the library at runtime

Thanks guys.. I will try that attachment.

And Merry Christmas as well!

-Uh Oh - It looks good - but I wondered can you atually set the whole area to the stage??